Best G Body Big Brake Kit for Front or Rear Upgrades

#1 · Best Overall

1. Wilwood Dynalite 12-Inch Rear Red

• Compatible with Vehicle Type: Car

Best for: 12-inch red-caliper rear upgrade.

Why it ranks #1: A purpose-listed rear big-brake kit for GM G-body flange and 2.62-inch offset, with 12-inch drilled rotors and a parking-brake solution.

A 12-inch drilled-rotor setup with red Wilwood Dynalite calipers defines this rear big-brake kit for a GM G-Body flange and 2.62-inch offset. The stated flange and offset give buyers concrete rear-axle details to compare, while the kit is identified as a parking-brake solution.

Wilwood identifies this as an FDL Pro-Series rear-disc big-brake kit for popular muscle-car rear axles that require a parking brake. Its 12-inch drilled rotors and Dynalite calipers establish the core configuration, while the GM G-Body flange and 2.62-inch offset narrow the intended fit. The listing also describes improved clamping force and stopping power as benefits of Wilwood kits. Confirm that the flange and offset suit the axle before committing to this specific rear setup.

Skip it if you want black calipers instead of red; Wilwood 140-17121-D lists the same 12-inch rear kit with black calipers.

This Wilwood kit suits a G-Body owner seeking a 12-inch drilled rear setup with red Dynalite calipers and parking-brake capability. Its flange and 2.62-inch offset are key fit boundaries, not optional details.

Listed on Amazon as: Wilwood 140-17121-DR Dynalite 12" Rear Big Brake Kit with Red Calipers and Drilled Rotors, Compatible with GM G-Body Flange & 2.62" OffseT

#2 · Black Caliper Option

2. Wilwood Dynalite 12-Inch Rear Black

• Compatible with Vehicle Type: Car

Best for: 12-inch black-caliper rear kit.

Why it ranks #2: Matches the G-body flange and 2.62-inch offset specification of the red version, with 12-inch drilled rotors and black calipers.

Black Wilwood Dynalite calipers paired with 12-inch drilled rotors distinguish this rear big-brake kit from its red-caliper counterpart. It is listed for a GM G-Body flange with a 2.62-inch offset, and the FDL Pro-Series description identifies a rear-disc solution for axles requiring a parking brake.

The specified combination of 12-inch drilled rotors and Dynalite calipers gives buyers a clear rear-brake configuration to compare with their axle and appearance preferences. Wilwood identifies the FDL Pro-Series kit as a complete rear-disc solution for popular muscle-car axles that require a parking brake. The listing names a GM G-Body flange and 2.62-inch offset, making those details central to fit assessment. It also describes improved clamping force and stopping power as benefits of Wilwood big-brake kits.

Skip it if you prefer red calipers; Wilwood 140-17121-DR lists the matching 12-inch rear kit with red calipers.

This Wilwood kit suits a G-Body owner seeking drilled 12-inch rear rotors, black Dynalite calipers, and a parking-brake solution. Check the GM G-Body flange and 2.62-inch offset against the intended axle.

Listed on Amazon as: Wilwood 140-17121-D Dynalite 12" Rear Big Brake Kit with Black Calipers and Drilled Rotors, Compatible with GM G-Body Flange & 2.62" OffseT

#3 · Complete Factory-Style Kit

3. Inline Tube Standard Rear Conversion

• Compatible with Vehicle Type: Car

Best for: Bolt-on standard-rotor conversion.

Why it ranks #3: A G-body-specific rear conversion includes standard rotors, loaded calipers, axle lines, hoses, hardware, and correct parking-brake cables.

Correct G-Body parking-brake cables and standard rotors define this Inline Tube rear conversion, with the listing describing a bolt-on installation that requires no modifications. The supplied package includes loaded calipers with pads, axle lines, hoses, brackets, and other components, helping buyers assess the scope of the conversion.

Inline Tube lists the parts shown as included, including loaded calipers with pads installed, caliper brackets and shims, rear axle lines, flexible hoses with clips and hose tabs, and G-Body-correct parking-brake cables. That broad parts coverage supports a more complete installation workflow than a package limited to rotors and calipers. The product description calls the kit bolt-on and says no modifications are required. Its stated application is 1978–87 GM G-Body rear disc conversion, so keep that scope in view.

Skip it if you specifically want cross-drilled and slotted rotors; Inline Tube DBK1012GX lists that rotor style for its rear conversion.

This Inline Tube kit suits a 1978–87 GM G-Body owner who values a listed bolt-on conversion with correct parking-brake cables and standard rotors. Choose another configuration if drilled and slotted rotors are essential.

Listed on Amazon as: Inline Tube Compatible with 1978-87 GM G-Body Rear Disc Brake Conversion With Standard Rotors And Parking Brake

#4 · Drilled Rotor Conversion

4. Inline Tube Drilled Rear Conversion

• Compatible with Vehicle Type: Car

Best for: Factory-style G-Body rear conversion.

Why it ranks #4: A complete 1978–87 G-body rear conversion includes drilled and slotted rotors, loaded calipers, cables, hoses, and hardware; it requires 15-inch wheels.

Cross-drilled and slotted rotors anchor this Inline Tube rear-disc conversion, giving G-Body owners a complete parts package for replacing rear drums. Loaded calipers arrive with pads, while the kit also includes parking-brake cables, lines, hoses, brackets, and installation hardware for a more comprehensive conversion.

The factory-style component approach puts the major braking and connection pieces together: rotors, single-piston calipers with pads, cables, lines, hoses, and hardware. That breadth can simplify planning compared with sourcing each conversion part separately. The listed application is 1978–87 GM G-Body, but compatibility also requires a 7.5-inch rear axle and wheels at least 15 inches in diameter. Those requirements matter before installation, particularly when axle and wheel specifications are not already known.

Skip it if you have an axle other than a 7.5-inch unit; the Leed Brakes RC1008X lists compatibility with GM 10-bolt 7.5- or 8.5-inch axles.

This kit suits a 1978–87 GM G-Body owner seeking a broad, factory-style rear-disc parts package with parking-brake components. Treat the 7.5-inch axle and 15-inch minimum wheel requirements as essential fit boundaries before choosing it.

Listed on Amazon as: Inline Tube Compatible with 1978-87 GM G-Body Rear Disc Brake Conversion With Cross Drilled And Slotted Rotors With Parking Brake

#5 · 10-Bolt Axle Fit

5. Leed Brakes MaxGrip XDS Rear

• Compatible with Vehicle Type: Car

Best for: GM 10-bolt axle conversion.

Why it ranks #5: Specifically serves GM 10-bolt 7.5- or 8.5-inch rear axles, with 11-inch, 1-inch-thick rotors and a 15×7 minimum recommended wheel.

Compatibility with GM 10-bolt 7.5-inch or 8.5-inch rear axles is the key distinction of this Leed Brakes conversion. Its 11-inch MaxGrip XDS rear rotors and stated 15-by-7-inch minimum recommended wheel diameter give buyers practical axle and wheel specifications to assess before planning the swap.

Leed identifies the kit as a rear drum-to-disc conversion for GM 10-bolt axles and says it supplies the components needed to mount single-piston disc brakes. The stated axle range includes both 7.5-inch and 8.5-inch units, while the 11-inch MaxGrip XDS rotors are 1 inch thick. A minimum recommended 15-by-7-inch wheel diameter is also listed. These specifications help narrow fit decisions, but the axle flange must still match the stated three-bolt configuration.

Skip it if you have a different axle flange; Inline Tube DBK1012G is listed for 1978–87 GM G-Body rear conversions instead.

This Leed Brakes kit suits a GM 10-bolt axle owner converting rear drums to single-piston discs, especially when the axle and wheel specifications match. Its three-bolt flange application is a specific boundary to check.

Listed on Amazon as: Leed Brakes Rear Disc Brake Conversion Kit – Gm 10 Bolt Axles With 3 Bolt Flange – Maxgrip Xds

#6

6. Southwest Speed Wilwood Front Kit

Best for: Six-piston front-brake upgrade.

Why it ranks #6: A front disc kit for 1979–87 GM G-body applications features 12-inch drilled rotors and red Dynapro six-piston calipers.

Red Dynapro six-piston calipers distinguish this Southwest Speed front kit, paired with 12-inch drilled rotors for a specified G-Body-era application. The front-only configuration makes it relevant to buyers targeting the front brakes rather than a rear conversion, with pads also identified in the product title.

The title specifies a full front disc-brake kit for 1979–87 GM G-Body vehicles and names the El Camino, Monte Carlo, S10, Pontiac Grand Prix, and LeMans. Its 12-inch drilled rotors and six-piston red Dynapro calipers are the central hardware details for shoppers comparing front setups. Pads are included according to the title, so they are part of the listed package. The supplied information does not detail installation steps or axle requirements; use the named front application as the fit boundary.

Skip it if you need rear brakes rather than a front kit; the Wilwood 140-17121-DR is listed as a G-Body rear big-brake kit.

This Southwest Speed kit suits a buyer upgrading the front brakes on one of its named 1979–87 GM applications. It is not the choice for a rear conversion, and the supplied details do not specify additional fit requirements.

Listed on Amazon as: NEW WILWOOD FULL FRONT DISC BRAKE KIT, 12" DRILLED ROTORS, RED DYNAPRO 6 PISTON CALIPERS, PADS, 1979-1987 GM G-BODY, CHEVY EL CAMINO, MONTE CARLO, S10, PONTIAC GRAND PRIX, LEMANS

#7

7. Fizzvex Drilled Rear Conversion

Best for: Multi-model drilled-rotor conversion.

Why it ranks #7: Lists 11-inch drilled and slotted rotors, built-in emergency-brake calipers, cables, hoses, hardware, and several G-body-era applications.

Two 11-inch drilled-and-slotted rotors with both 5-on-4.5-inch and 5-on-4.75-inch bolt patterns define this Fizzvex rear conversion. The combination gives buyers specific rotor and pattern details to check against their setup, while built-in-emergency-brake calipers and cables address parking-brake components in the same kit.

The package lists two rotors, two calipers with built-in emergency brakes, two emergency-brake cables, rubber hoses, and complete mounting hardware. Having those parts together supports a single conversion workflow rather than a rotor-only replacement. The listed applications include G-Body-era El Camino, Malibu, and Monte Carlo models, as well as several other Buick, Chevrolet, Oldsmobile, and Pontiac vehicles. Verify that the vehicle is among the stated applications and that the two listed bolt patterns match the intended wheel setup.

Skip it if you need a kit explicitly listing a 7.5-inch axle requirement; Inline Tube DBK1012GX states that axle specification for its G-Body application.

This Fizzvex kit fits buyers whose vehicle appears in its listed applications and whose wheel pattern matches one of the stated options. Its application list and rear-conversion contents—not a universal fit claim—should guide the decision.

Listed on Amazon as: Rear Disc Brake Conversion Kit Drilled Rotor Replacement for G Body S10

#8

8. SuDaoSun Drilled Rear Conversion

• Compatible with Vehicle Type: Car

Best for: Emergency-brake caliper package.

Why it ranks #8: Includes 11-inch drilled and slotted rotors, emergency-brake calipers, cables, hoses, and hardware, but fitment should be confirmed against the axle.

Built-in emergency brakes on the calipers are a defining feature of this SuDaoSun rear conversion, pairing parking-brake function with a package that includes cables and hoses. Its two 11-inch drilled-and-slotted rotors also list two bolt-pattern options, giving G-Body buyers concrete details to compare with their vehicle.

The package includes two rotors, two emergency-brake calipers, two cables, two rubber hoses, and mounting hardware such as brackets, bolts, and spacers. Those pieces cover several parts of a rear-disc conversion in one purchase and can reduce the need to assemble a separate hardware list. Listed applications include G-Body-era Chevrolet models, plus specified Buick, Pontiac, and Oldsmobile vehicles. Check the stated model years and the 5-on-4.5-inch or 5-on-4.75-inch rotor pattern against your setup.

Skip it if you need a kit whose listing specifies a 7.5-inch rear axle; Inline Tube DBK1012GX explicitly gives that axle requirement.

Choose this SuDaoSun kit if your vehicle matches its listed applications and you want emergency-brake calipers, cables, hoses, and mounting hardware together. Its stated rotor patterns and model-year coverage define the fit boundary.

Listed on Amazon as: Rear Disc Brake Conversion Kit Replacement for Malibu Camaro G Body S10

#9

9. SKAUTOPT 10-Bolt Rear Conversion

• Compatible with Vehicle Type: Cars

Best for: Axle-pull G-Body conversion.

Why it ranks #9: Offers drilled 11-inch rotors, emergency-brake calipers, cables, hoses, and hardware; the listing requires 15-inch wheels and axle removal.

This SKAUTOPT kit explicitly says the axles must be pulled during installation, a significant planning detail for its 10-bolt rear-disc conversion. It also requires disc-brake wheels of at least 15 inches, while the listed package includes drilled-and-slotted rotors, emergency-brake calipers, cables, hoses, and hardware.

The two 11-inch drilled-and-slotted rotors are listed with 5-on-4.5-inch and 5-on-4.75-inch bolt patterns, and the kit includes calipers with built-in emergency brakes. Cables, rubber hoses, and mounting hardware round out the supplied parts. Together, these details describe a substantial rear conversion package, but installation requires pulling the axles and using disc-brake wheels at least 15 inches in diameter. The stated applications cover specific Buick, Chevrolet, Pontiac, and Oldsmobile model years.

Skip it if you cannot pull the axles for installation; Inline Tube DBK1012G is listed as a bolt-on G-Body conversion.

This SKAUTOPT package suits an owner whose vehicle matches its application list and who can accommodate axle removal during installation. Its 15-inch minimum wheel requirement is another important boundary to verify.

Listed on Amazon as: 10 Bolt Rear Disc Brake Conversion Kit Drilled Rotor Compatible with G Body

#10

10. Crown Automotive Rear Big Brake Kit

• Compatible with Vehicle Type: Car

Best for: JK Wrangler oversized-wheel kit.

Why it ranks #10: Its 13.5-inch rotors and bolt-on description target a JK Wrangler, not a G-body, so it is a poor match for this search.

The 13.5-inch rotors and extended caliper brackets are specified for an RT Off-Road rear big-brake kit intended for JK Wrangler use. The listing says the larger rotors provide increased leverage and piston area over the factory caliper, while bolt-on installation requires no cutting, welding, or spacers.

This kit is explicitly described for a JK Wrangler, where oversized wheels and tires place strain on the braking system. Its 13.5-inch rotors and extended caliper brackets are linked in the listing to increased leverage and piston area over the factory caliper. Bolt-on installation, with no cutting, welding, or spacers required, can simplify the stated installation workflow. Despite appearing in a G-Body roundup, the supplied application is not a GM G-Body fitment.

Skip it if you need a GM G-Body kit; Wilwood 140-17121-DR is listed for a GM G-Body flange and rear use.

This Crown Automotive kit is for a JK Wrangler owner addressing braking strain from oversized wheels and tires. It is not an appropriate match for a GM G-Body, despite its inclusion in this roundup.

Listed on Amazon as: Crown Automotive Big Brake Kit Brake