Best Electric Parking Brake Kit for Custom Builds and Retrofits

Best Electric Parking Brake Kit

A strong electric parking brake kit should match your rear brake setup and provide the actuator, wiring, and controls your installation requires. These options suit custom builds that need a button-operated alternative to a hand or foot lever, as well as Wilwood brake systems needing a compatible electronic parking-brake retrofit. The lineup ranges from Speedway Motors cable-and-actuator systems to Wilwood kits specified for particular rotor widths and caliper setups.

That distinction matters: a universal-style cable kit is not interchangeable with a caliper retrofit simply because both use an electric control. Start by identifying your rear-brake hardware, then check rotor thickness, axle or caliper compatibility, available clearance, and exactly what the kit includes.

The rankings favor clearly described functionality and useful fit details, not claims that cannot be verified from the listings.

The Speedway Motors Remote-Mount Electric Emergency Brake Kit is the strongest overall pick for a custom installation because it combines a self-contained 12V actuator, adjustable 200 lb pull, dual 8-foot cables, relay, hardware, and push-button control. Its remote-mount housing can keep components out of the cabin, while the cable layout offers flexibility for custom builds. If you need a caliper-based Wilwood retrofit instead, choose only after matching the kit’s specified rotor width and confirming vehicle clearance.

Our Top Picks

Speedway Remote-Mount Brake KitBest Overall

Speedway Remote-Mount Brake Kit

The self-contained 12V system includes an adjustable 200 lb actuator, dual 8-foot cables, relay, hardware, and push-button control.

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Speedway Electric Brake KitBroad Brake Compatibility

Speedway Electric Brake Kit

Designed for most drum or disc parking-brake assemblies, it includes adapters for common rear-disc setups and uses a latching button.

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Wilwood 1.25-Inch Black RetrofitBlack Caliper Retrofit

Wilwood 1.25-Inch Black Retrofit

This car-focused retrofit specifies a 1.25-inch rotor and lists a switch, harness, and controller, useful details for matching a build.

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Compare the Kits by Fit and Installation Type

#ProductWeightCompatible with Vehicle TypeBuy
116 lb—View on Amazon
2
Speedway Electric Brake Kit2. Speedway Electric Brake KitBroad Brake Compatibility
11 lb—View on Amazon
315.7 lbCarView on Amazon
415.3 lbCarView on Amazon
5——View on Amazon
6
Wilwood 0.81-Inch Black Retrofit6. Wilwood 0.81-Inch Black RetrofitCar-and-truck 0.81-inch rotors
75 lbCar, TruckView on Amazon
7
Wilwood 0.62-Inch Caliper Kit7. Wilwood 0.62-Inch Caliper Kit0.62-inch rotor projects
30 lbCarView on Amazon
8
Wilwood Red Rear Retrofit Kit8. Wilwood Red Rear Retrofit KitRed-caliper retrofit shoppers
15.4 lbCar, Truck, VanView on Amazon
9
Wilwood Dynalite Red Rear Kit9. Wilwood Dynalite Red Rear KitForged Dynalite rear upgrade
—CarView on Amazon
10
Wilwood Pro Street Red Upgrade10. Wilwood Pro Street Red UpgradeSelect Dynalite Pro Series upgrades
80 lbCarView on Amazon

Detailed Reviews: Best Electric Parking Brake Kit

Speedway Remote-Mount Brake Kit

#1 · Best Overall

1. Speedway Remote-Mount Brake Kit

  • Weight: 16 lb

Best for: Remote-mount custom builds.

Why it ranks #1: The self-contained 12V system includes an adjustable 200 lb actuator, dual 8-foot cables, relay, hardware, and push-button control.

A self-contained, remote-mount actuator keeps the mechanism away from the cabin while a push button operates the emergency brake. Speedway Motors pairs it with an adjustable 200-pound actuator and two eight-foot cables, giving custom-build planners specific hardware and cable reach to consider.

The remote-mount housing lets builders place the actuator outside the cabin, while the push-button control avoids a bulky brake handle inside it. Its 12-volt self-contained system combines an adjustable 200-pound actuator with two eight-foot cables, offering defined pull force and cable length for layout planning. Speedway Motors describes the metal housing as weatherproof and says the system avoids extra external cable mounts. Those details can simplify component placement, but cable routing still has to suit the vehicle.

Pros
  • Remote-mount self-contained actuator
  • Adjustable 200-pound actuator
  • Two eight-foot cables
  • 12-volt push-button control
Cons
  • The supplied cables are eight feet long, which bounds available cable reach.

Skip it if you need an electronic caliper retrofit with a specified rotor thickness; Wilwood 140-16849-BK lists a 1.25-inch rotor.

Choose this Speedway Motors kit for a 12-volt custom build that benefits from remote actuator placement, push-button operation, and its included cable lengths. Check that the eight-foot cables can be routed to the intended brake assembly.

Full product details
BrandSpeedway Motors
Item Weight‎16 pounds
Item model number‎9101124
Manufacturer‎Speedway Motors
Part Number‎9101124
Model‎Speedway Motors
Dimensions‎21 x 11 x 6 inches
Additional InformationImportant Information Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov

Listed on Amazon as: Speedway Motors Power Remote-Mount Electric Emergency Brake Kit, 12V Self-Contained System 200 lb Adjustable Actuator, Push Button Control, Dual 8 Ft Cables, Relay, and Hardware

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Speedway Electric Brake Kit

#2 · Broad Brake Compatibility

2. Speedway Electric Brake Kit

  • Weight: 11 lb

Best for: Custom interior space saver.

Why it ranks #2: Designed for most drum or disc parking-brake assemblies, it includes adapters for common rear-disc setups and uses a latching button.

A single latching push button sets or releases the brake, replacing a hand or foot-operated handle and freeing cabin space. Speedway Motors includes cables and brackets, plus adapters for common rear-disc setups, making this a control-focused option for custom builds that use compatible drum or disc parking-brake assemblies.

The latching button gives the driver a straightforward way to apply or release the brake without a conventional cabin lever or pedal. Its space-saving layout suits custom interiors where those controls compete with other components. Speedway Motors describes compatibility with most drum or disc parking-brake assemblies and includes adapters for common rear-disc setups, so the kit can serve more than one brake arrangement. The stated compatibility is broad, but not universal; the product is still intended for parking-brake assemblies.

Pros
  • Latching push-button control sets and releases the brake
  • Replaces traditional hand or foot-operated handles
  • Frees space in custom vehicle interiors
  • Includes adapters for common rear-disc setups
Cons
  • Compatibility is described for most, not all, drum or disc parking-brake assemblies.

Skip it if you need a kit specified for a particular rotor thickness; Wilwood 140-16849-BK lists a 1.25-inch rotor.

Choose this Speedway Motors kit for a custom interior where push-button operation and reclaimed space matter, and where the existing parking-brake assembly is compatible. Its stated broad drum-and-disc coverage is not a guarantee for every setup.

Full product details
BrandSpeedway Motors
Item Weight‎11 pounds
Item model number‎9100870
Manufacturer‎Speedway Motors
Part Number‎9100870
Model‎Speedway Motors
Dimensions‎15 x 3.25 x 1.8 inches

Listed on Amazon as: Electric Emergency Parking Brake Kit with Cables and Brackets

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Wilwood 1.25-Inch Black Retrofit

#3 · Black Caliper Retrofit

3. Wilwood 1.25-Inch Black Retrofit

  • Weight: 15.7 lb
  • Compatible with Vehicle Type: Car

Best for: 1.25-inch rotor retrofit.

Why it ranks #3: This car-focused retrofit specifies a 1.25-inch rotor and lists a switch, harness, and controller, useful details for matching a build.

A listed 1.25-inch rotor and included switch, harness, and controller distinguish this black Wilwood rear retrofit kit. Those electrical components give the buyer a defined control set to plan around, while the specification names car compatibility and keeps the application centered on passenger-car rear brake projects.

The 1.25-inch rotor specification gives a concrete dimension for assessing whether this retrofit belongs in a particular rear-brake setup. Wilwood also identifies a switch, harness, and controller, so the listed electrical-control pieces are accounted for in installation planning rather than left as unspecified accessories. The black finish differentiates the caliper appearance, and the compatible vehicle type is listed as car. Buyers working with a truck should look instead at a kit whose supplied data includes trucks, such as Wilwood 140-15978-BK.

Pros
  • Specifies a 1.25-inch rotor
  • Includes switch, harness, and controller
  • Black caliper finish
  • Lists car compatibility
Cons
  • The listed compatible vehicle type is car, not truck.

Skip it if you are fitting a truck; Wilwood 140-15978-BK lists compatibility with cars and trucks and specifies 0.81-inch rotors.

This is a focused option for a car project that needs a 1.25-inch rotor retrofit with the switch, harness, and controller identified. Treat the listed car compatibility and rotor dimension as meaningful boundaries when selecting it.

Full product details
BrandWilwood
Compatible with Vehicle TypeCar
Included ComponentsPer Item Description
Item Weight15.7 pounds
ManufacturerWilwood
Part Number140-16849-BK
Manufacturer Warranty Description30 Days
Model Number140-16849-BK
Model Year2023
Additional InformationImportant Information Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov

Listed on Amazon as: Wilwood Electronic Parking Brake Rear Retrofit Brake Kits 140-16849-BK

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Wilwood 0.81-Inch Red Retrofit

#4 · Red Caliper Retrofit

4. Wilwood 0.81-Inch Red Retrofit

  • Weight: 15.3 lb
  • Compatible with Vehicle Type: Car

Best for: Red-caliper 0.810-inch setup.

Why it ranks #4: The .810-inch rotor-width kit explicitly includes red powdercoat calipers, controller, harness, and switch assembly.

A 0.810-inch rotor-width application paired with red powder-coated calipers makes this Wilwood rear electronic parking-brake system easy to distinguish. The listing also includes a controller, harness, and switch assembly, providing the named electrical components for a car retrofit built around that rotor dimension.

The specified 0.810-inch rotor width gives the installer a concrete application point for evaluating the rear brake setup. Wilwood lists a controller, harness, and switch assembly, helping buyers plan the electronic control workflow with those parts identified. Its red powder-coated calipers set the visible finish, while the compatible vehicle type is listed as car. Since the rotor dimension and vehicle category are specific, this kit is best assessed against the actual rear-brake configuration rather than chosen by finish alone.

Pros
  • Specifies 0.810-inch rotor width
  • Red powder-coated calipers
  • Includes controller and harness
  • Includes switch assembly
Cons
  • The listed compatible vehicle type is car, not truck.

Skip it if you need a listed truck application; Wilwood 140-15978-BK specifies 0.81-inch rotors and lists cars and trucks.

This Wilwood system fits the brief for a car project using the stated 0.810-inch rotor width and seeking red calipers with the electrical control components listed. Its car-only vehicle listing is an important boundary.

Full product details
BrandWilwood
Compatible with Vehicle TypeCar
Included ComponentsPer Item Description
Item Weight15.3 pounds
ManufacturerWilwood
Part Number140-15978-RD
Manufacturer Warranty Description30 Days
Model Number950-140-15978-RD
Additional InformationImportant Information Proposition 65 Warning for California Consumers WARNING: This product can expose you to chemicals including styrene which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov

Listed on Amazon as: Wilwood 140-15978-RD Electronic Rear Park Brake System, Red

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Wilwood 1.19–1.25-Inch Red Retrofit

#5 · Wide Rotor Range

5. Wilwood 1.19–1.25-Inch Red Retrofit

Best for: Red calipers, 1.19–1.25-inch rotors.

Why it ranks #5: Its description specifies a 1.19-to-1.25-inch rotor thickness and lists a wiring harness, switch, and controller.

A stated 1.19-to-1.25-inch rotor-thickness range gives this red Wilwood rear retrofit a broader dimension window than kits listing one rotor size. The supplied package description also names a wiring harness, switch, and controller, giving buyers the key electrical components for planning a compatible installation.

The 1.19-to-1.25-inch rotor range is the main selection aid: it lets a buyer compare the kit against a rear setup within that stated thickness window. Wilwood also lists a wiring harness, switch, and controller, giving the electronic parking-brake installation its named control components. Red powder-coated calipers provide the finish. The supplied details do not identify a compatible vehicle category, so the rotor range and listed kit components are the available project-planning facts rather than a vehicle-specific fit claim.

Pros
  • Specifies a 1.19-to-1.25-inch rotor-thickness range
  • Red powder-coated calipers
  • Includes wiring harness
  • Includes switch and controller
Cons
  • The supplied listing does not identify a compatible vehicle category.

Skip it if you need an explicitly listed car-and-truck application; Wilwood 140-15978-BK specifies both and lists 0.81-inch rotors.

This Wilwood retrofit suits buyers whose rear rotor thickness falls within the stated 1.19-to-1.25-inch range and who want the listed electrical controls. Vehicle compatibility is not specified here, so that remains a key boundary.

Full product details
BrandWilwood
Included ComponentsWilwood Electronic Parking Brake Rear Retrofit Brake Kits 140-16849-RD
ManufacturerWilwood
Part Number140-16849-RD
Manufacturer Warranty DescriptionManufacturer
Model Number140-16849-RD

Listed on Amazon as: Wilwood Electronic Parking Brake Rear Retrofit Brake Kits 140-16849-RD

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Wilwood 0.81-Inch Black Retrofit

#6

6. Wilwood 0.81-Inch Black Retrofit

  • Weight: 75 lb
  • Compatible with Vehicle Type: Car, Truck

Best for: Car-and-truck 0.81-inch rotors.

Why it ranks #6: A black-caliper retrofit for 0.81-inch rotors, it includes a controller, harness, and switch and lists car and truck compatibility.

A 0.81-inch rotor application and listed car-and-truck compatibility set this black Wilwood retrofit apart. The included controller, harness, switch, hardware, and instructions give installers a defined set of electrical and installation components to plan around for a compatible rear-brake project.

Wilwood specifies 0.81-inch rotor width, giving buyers a concrete dimension to compare with the rear brake setup before planning the retrofit. The listing names cars and trucks as compatible vehicle types, a broader stated range than car-only kits. A controller, harness, and switch address the electrical control side, while included hardware and instructions help organize installation. At 75 pounds listed weight, this is a substantial kit to account for when handling and staging components during the build.

Pros
  • Specifies 0.81-inch rotor width
  • Lists car and truck compatibility
  • Includes controller, harness, and switch
  • Hardware and instructions are included
Cons
  • The stated rotor application is limited to 0.81-inch width.

Skip it if you use 1.25-inch rotors; Wilwood 140-16849-BK specifies that rotor size and includes a switch, harness, and controller.

Choose this black Wilwood retrofit when a car or truck project matches its 0.81-inch rotor specification and benefits from the listed electrical and installation components. Rotor width remains the central application boundary for the kit.

Full product details
BrandWilwood
Compatible with Vehicle TypeCar, Truck
Included ComponentsHardware & instructions.
Item Weight75 pounds
ManufacturerWilwood Brakes
Part NumberACCESSPEED-WIL-140-15978-BK
Manufacturer Warranty DescriptionManufacturer Warranty
Model NumberEPB
Model Year2025

Listed on Amazon as: Wilwood 140-15978-BK Electronic Parking Brake Rear Retrofit Brake Kit With Black Calipers on 0.81" Rotors

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Wilwood 0.62-Inch Caliper Kit

#7

7. Wilwood 0.62-Inch Caliper Kit

  • Weight: 30 lb
  • Compatible with Vehicle Type: Car

Best for: 0.62-inch rotor projects.

Why it ranks #7: This rear EPB caliper kit is specified for 0.62-inch-thick rotors and includes a switch, harness, and controller.

A specified 0.62-inch rotor thickness is the defining fit detail of this Wilwood rear EPB caliper kit. Its listing also names a switch, harness, and controller, giving buyers a clearer picture of the electrical parts supplied for a compatible car installation than a kit description with no control components identified.

The 0.62-inch rotor specification narrows the application to rear brake setups using that stated disc thickness, making it central to selection rather than a minor detail. Wilwood lists a switch, harness, and controller, which helps buyers account for the electronic control pieces during installation planning. The listing identifies the compatible vehicle type as car and includes installation instructions. Together, these details support a more defined project plan, but the rotor dimension remains a firm application boundary.

Pros
  • Specifies compatibility with a 0.62-inch rotor
  • Includes switch, harness, and controller
  • Lists car compatibility
  • Installation instructions are included
Cons
  • The kit is specified for 0.62-inch rotor thickness, limiting its stated application.

Skip it if you use 0.81-inch rotors; Wilwood 140-15978-BK is listed for that thickness and includes controller, harness, and switch.

This Wilwood kit suits a car project whose rear brakes use 0.62-inch-thick rotors and need the listed electrical controls. Its rotor specification is the key boundary; it is not the listed choice for thicker discs.

Full product details
BrandWilwood
Compatible with Vehicle TypeCar
Included ComponentsInstallation Instructions Included.
Item Weight30 pounds
ManufacturerWilwood
Part NumberWIL-140-18031-BK
Manufacturer Warranty DescriptionIf a manufacturer warranty issue arises, the manufacturer will work directly with the Buyer to resolve the issue. Except under warranty, this product is not returnable to Accesspeed or Wilwood if it has been assembled, installed, used and/or damaged in any way. Images and product descriptions are su
Model Number140-18031-BK
Additional InformationImportant Information Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov

Listed on Amazon as: Wilwood 140-18031-BK Rear EPB Parking Brake Caliper Kit, Black, W/Switch, Harness & Controller for .62 Rotor

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Wilwood Red Rear Retrofit Kit

#8

8. Wilwood Red Rear Retrofit Kit

  • Weight: 15.4 lb
  • Compatible with Vehicle Type: Car, Truck, Van

Best for: Red-caliper retrofit shoppers.

Why it ranks #8: It is a rear electronic parking-brake retrofit for cars, trucks, and vans, but the listing provides no rotor-width or included-control details.

A red powder-coated caliper gives this Wilwood rear electronic parking-brake retrofit kit its clearest identifying feature. The supplied listing identifies compatibility with cars, trucks, and vans, making it relevant to buyers considering a rear retrofit across those vehicle categories, while leaving rotor and included-component specifics to the item description.

The electronic parking-brake retrofit format focuses the kit on adding a rear parking-brake solution rather than replacing a cabin control with a universal actuator. Its red powder-coated caliper provides a visible finish detail, while the listed vehicle types—car, truck, and van—show the broad categories the listing names. However, the supplied specifications do not state a rotor thickness or enumerate the kit's components, so planning an installation around those details requires information beyond what is provided here.

Pros
  • Electronic rear parking-brake retrofit kit
  • Red powder-coated caliper
  • Listed for cars
  • Also lists trucks and vans
Cons
  • The supplied listing gives no rotor-thickness specification for matching the kit.

Skip it if you need a stated rotor size and controller, switch, and harness; Wilwood 140-16849-BK specifies those details.

Consider this Wilwood retrofit if a red caliper and the listed car, truck, or van categories suit your project. The supplied details are limited, so it is a poor choice when rotor thickness or included electrical parts must be established from this listing.

Full product details
BrandWilwood
Compatible with Vehicle TypeCar, Truck, Van
Included ComponentsPer Item Description
Item Weight15.4 pounds
ManufacturerWilwood
Part Number140-15979-RD
Manufacturer Warranty Description30 Days
Model Number950-140-15979-RD
Additional InformationImportant Information Proposition 65 Warning for California Consumers WARNING: This product can expose you to chemicals including styrene which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov

Listed on Amazon as: Wilwood Electronic Parking Brake Rear Retrofit Brake Kit – Red Powder Coat Caliper

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Wilwood Dynalite Red Rear Kit

#9

9. Wilwood Dynalite Red Rear Kit

  • Compatible with Vehicle Type: Car

Best for: Forged Dynalite rear upgrade.

Why it ranks #9: The forged Dynalite rear kit is described for popular car and truck axles and includes four-piston calipers and 12.19-inch rotors.

Forged billet-aluminum Dynalite four-piston calipers and 12.19-inch one-piece rotors define this Wilwood rear electronic parking-brake kit. The listed combination gives buyers concrete brake hardware to evaluate for popular car and truck rear axles, with a red powder-coated caliper finish and a D/S rotor designation.

The forged billet-aluminum four-piston Dynalite calipers and 12.19-inch one-piece rotors identify a substantial rear brake package rather than a universal actuator-and-cable kit. Wilwood describes the EPB system as a solution for popular car and truck rear axles, so the hardware is aimed at an axle-specific brake build. The red powder-coated caliper is a visible finish choice. The D/S rotor designation is also part of the listing, making careful attention to the stated kit configuration important during selection.

Pros
  • Forged billet-aluminum Dynalite calipers
  • Four-piston calipers
  • 12.19-inch one-piece rotors
  • Red powder-coated calipers
Cons
  • The supplied listing specifies D/S rotors, so the rotor configuration is not broadly described.

Skip it if you need a retrofit for an existing select Dynalite Pro Series kit; Wilwood 140-18080-R is explicitly an upgrade kit for those brakes.

Consider this Wilwood kit for a car or truck rear-axle build seeking the listed Dynalite calipers and 12.19-inch rotors with electronic parking-brake capability. The D/S rotor designation makes configuration a key selection boundary.

Full product details
BrandWilwood
Compatible with Vehicle TypeCar
Part Number140-16138-DR
Additional InformationImportant Information Proposition 65 Warning for California Consumers WARNING: This product can expose you to chemicals including styrene which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov

Listed on Amazon as: Wilwood Forged Dynalite Rear Electronic Parking Brake Kit – Red Powder Coat Caliper – D/S Rotor

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Wilwood Pro Street Red Upgrade

#10

10. Wilwood Pro Street Red Upgrade

  • Weight: 80 lb
  • Compatible with Vehicle Type: Car

Best for: Select Dynalite Pro Series upgrades.

Why it ranks #10: This is an upgrade for select Forged Dynalite Pro Series kits, and the listing warns of substantial clearance needs and a specific A-body fit exclusion.

This Wilwood upgrade is specifically for select Forged Dynalite Pro Series rear brake kits, and its red calipers add a clear finish distinction. That narrow upgrade target matters: the listing warns that the calipers need substantial clearance between rotor and frame or suspension, and excludes 1968–1974 A-Body cars.

Because this is an upgrade for select Forged Dynalite Pro Series rear brake kits, it is not presented as a universal rear parking-brake conversion. The red calipers require substantial room between the rotor and the car's frame or suspension, so clearance is a practical installation constraint to resolve before beginning. Wilwood specifically states that the kit will not fit 1968–1974 A-Body cars because of frame clearance. The warning makes vehicle layout and existing brake hardware central to choosing this retrofit.

Pros
  • Upgrade kit for select Forged Dynalite Pro Series rear brakes
  • Red calipers included
  • Clearance requirement is explicitly identified
  • Excludes 1968–1974 A-Body cars due to frame clearance
Cons
  • Requires substantial clearance between the rotor and frame or suspension.

Skip it if you have a 1968–1974 A-Body; Wilwood 140-15978-BK is listed as a rear retrofit for 0.81-inch rotors instead.

Choose this upgrade only for a compatible Forged Dynalite Pro Series rear setup with sufficient frame and suspension clearance. The stated A-Body exclusion and clearance demand are decisive boundaries, not minor installation details.

Full product details
BrandWilwood
Compatible with Vehicle TypeCar
Included ComponentsInstallation Instructions Included.
Item Weight80 pounds
ManufacturerWilwood
Part NumberWIL-140-18080-R
Manufacturer Warranty DescriptionIf a manufacturer warranty issue arises, the manufacturer will work directly with the Buyer to resolve the issue. Except under warranty, this product is not returnable to Accesspeed or Wilwood if it has been assembled, installed, used and/or damaged in any way. Images and product descriptions are su
Model Number140-18080-R
Additional InformationImportant Information Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov

Listed on Amazon as: Wilwood 140-18080-R EPB Rear Pro Street Electronic Parking Brake Upgrade Kit with Red Calipers for Select Forged Dynalite Pro Series Rear Brake Kits

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Avoiding fit and clearance surprises

The most important compatibility trap is treating all electric parking brake kits as universal. Speedway Motors describes its cable systems as working with most drum or disc parking-brake assemblies, while Wilwood’s caliper kits specify rotor widths such as 0.62, 0.81, 1.25, or 1.19–1.25 inches. Those are different installation approaches, not interchangeable fit ranges.

The Pro Street upgrade adds another constraint: its listing says the calipers need substantial space between the rotor and frame or suspension, and excludes 1968–1974 A-body cars because of frame clearance. Before ordering, identify the rear brake parts already on the vehicle, measure rotor thickness, and check axle, caliper, and suspension clearance against the kit’s application details.

A listing that omits these measurements is a reason to verify fit with the manufacturer or seller, not a reason to assume compatibility.

What a complete installation can still leave unresolved

A kit listing that names a controller, harness, and switch gives a clearer picture of the electrical components than one that simply says electronic retrofit, but it does not establish vehicle-specific wiring compatibility. The Speedway remote-mount kit describes a self-contained 12V actuator and includes a relay, two cables, and push-button control; the Wilwood retrofit listings commonly name a controller, harness, and switch. Neither detail alone confirms how the kit connects to a particular vehicle’s electrical system or whether additional installation work is required.

Another trade-off is the brake hardware itself: a cable actuator can suit a custom setup built around existing parking-brake assemblies, while a caliper retrofit may require matching the exact rotor width and caliper arrangement. Treat the included-parts list as a starting point.

Confirm wiring instructions, parking-brake interface, mounting location, and the rest of the required hardware before beginning installation.

How to Choose an Electric Parking Brake Kit

Actuator and brake-system approach

First decide whether your build needs a cable actuator for existing parking-brake hardware or a caliper-based retrofit. The Speedway Electric Brake Kit is described for most drum or disc parking-brake assemblies and includes adapters for common rear-disc setups; the Remote-Mount Brake Kit instead lists dual 8-foot cables and a 200 lb adjustable actuator. Wilwood’s choices are rear caliper systems, with some listing specific rotor thicknesses.

Buyers keeping compatible existing brake assemblies may favor a Speedway cable system. Buyers installing or upgrading a matching Wilwood rear setup should focus on the relevant Wilwood rotor and caliper specifications rather than treating the kits as universal.

Rotor thickness and application fit

Look for an explicit rotor-width match before choosing a caliper-based kit. The listed Wilwood options include a 0.62-inch rotor kit, .810-inch options, a 1.25-inch option, and a 1.19-to-1.25-inch range. Vehicle compatibility also varies: some listings say car only, while others specify car and truck or car, truck, and van.

The .810-inch red and black retrofits are options to investigate when that rotor width matches; the 0.62-inch kit suits a narrower specified rotor, and the 1.25-inch listing serves a different thickness. If your rotor measurement or vehicle application is unclear, verify it before ordering instead of inferring fit from the brand or color.

Included controls and installation layout

Compare the listed electrical and cable components, then consider where the actuator must mount. The Remote-Mount Brake Kit lists a self-contained 12V system, relay, push-button control, and two 8-foot cables; several Wilwood kits name a controller, harness, and switch. The Speedway Electric Brake Kit describes a single latching button but gives fewer component details in the supplied listing.

A custom interior builder seeking to avoid a bulky hand or foot lever may prefer a button-operated option. Buyers prioritizing clearly identified controller and harness components may favor a Wilwood listing that names them, provided the brake and rotor fit.

Confirm mounting location, wiring requirements, and any unlisted hardware for your particular installation.

Which Electric Parking Brake Kit Should You Choose?

For a custom build needing a self-contained cable actuator, choose the Speedway Remote-Mount Brake Kit: its listing specifies a 12V system, 200 lb adjustable actuator, dual 8-foot cables, relay, and button control. If you want an electric button to operate existing drum or disc parking-brake assemblies, the Speedway Electric Brake Kit is the alternative, with adapters for common rear-disc setups. For a Wilwood caliper retrofit, select by rotor thickness: the Wilwood 0.62-Inch Caliper Kit, Wilwood 0.81-Inch Red Retrofit, Wilwood 1.25-Inch Black Retrofit, or Wilwood 1.19–1.25-Inch Red Retrofit each states a different fit detail.

The Wilwood Pro Street Red Upgrade is only for select Dynalite Pro Series kits and requires careful clearance checks. Verify vehicle fit and installation requirements before buying.

Frequently Asked Questions

How do I confirm that an electric parking brake kit fits my rear brakes and axle?

Confirm the axle and rear-brake configuration, then compare the kit’s stated rotor thickness, caliper requirements, brackets, and mounting details with your vehicle. Check the product’s fit information and installation instructions before ordering; a similar-looking rear brake setup does not guarantee compatibility. For custom builds, also plan the cable route and mounting location.

What wiring, power supply, and control setup does an electric parking brake need?

The required setup depends on the kit, so check its listed voltage, wiring, and included controls. For example, the remote-mount Speedway kit specifies a 12V system, relay, and push-button control; other listings mention a switch, harness, or controller. Verify your vehicle’s electrical system and follow the kit’s wiring instructions.

How much clearance should I allow around an electronic parking brake caliper?

Use the kit’s installation guidance and confirm clearance with the actual wheel, rotor, suspension, and nearby components; the supplied information does not establish a universal clearance figure. Pay particular attention to caliper and actuator placement through the full range of movement. If fit is uncertain, confirm the required space before buying or modifying parts.

Can an electric parking brake operate my existing rear brakes?

Some kits are intended to actuate existing drum or disc parking-brake assemblies, while caliper-based retrofits replace or add specific brake hardware. The Speedway Electric Brake Kit is described as an option for existing assemblies, with adapters for common rear-disc setups. Check that your brake configuration matches the kit’s stated applications and included adapters.

How should I choose among the Wilwood retrofit kits?

Start with the rotor thickness and the kit’s stated fit details, since the listed Wilwood options specify different rotor dimensions and configurations. Confirm caliper and vehicle clearance as well. The Pro Street upgrade is limited to select Dynalite Pro Series rear brake kits, so verify that compatibility rather than treating it as a universal retrofit.

Final Words

For a custom build that needs a self-contained cable actuator, the Speedway remote-mount kit is the strongest overall choice based on its listed 12V system, adjustable actuator, dual cables, relay, and button control. Choose a caliper-based Wilwood retrofit only after matching rotor thickness and checking clearance. If you want to actuate existing rear parking-brake assemblies, consider the Speedway electric kit and verify its adapters suit your setup.

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