Best Adapter Plate For Engine Conversion: Compare 10 Options

#1 · Best Overall

1. ICT Billet SBC-to-LS Adapter

• Weight: 2.1 lb
• Material: Aluminum
• Dimensions: 8 x 5 x 1 in

Best for: US-made billet LS conversion.

Why it ranks #1: Made from USA-produced 3/8-inch billet aluminum, it includes two plates and bolts, specifies OEM fitment, and states the 0.17-inch centerline change.

Made in Wichita, Kansas from aerospace-grade, US-produced 3/8-inch billet aluminum, this ICT Billet set targets SBC-to-LS engine swaps. It reuses existing small-block Chevy mounts and specifies a 0.17-inch upward crankshaft-centerline shift, giving builders two key fitment details.

The kit includes two adapter plates, eight flat-head bolts, and six M10-1.5 flange bolts; the plates are M10 threaded, so the specified hardware supports the intended mounting workflow. OEM specifications are cited for fitment, while the 0.17-inch centerline rise gives a concrete positioning change to plan around. Its 3/8-inch billet aluminum construction and natural finish distinguish the material and surface description without changing the stated SBC-to-LS application.

Skip it if you are converting a Predator 670 to a Kohler drivetrain; joytrace's Predator 670 adapter kit is listed for that setup.

Choose this set for an SBC vehicle receiving an LS engine when its stated hardware and centerline rise match your swap plan. The documented application is automotive SBC-to-LS, not mini-bike engine conversion.

Listed on Amazon as: ICT Billet SBC Vehicle to LS Engine – Motor Mount Adapter Plate – Universal Swap Bracket Small Block LS Conversion Adjustable LS1 LS3 LS2 LQ4 LQ9 LS6 L92 L99 L33 LR4 Billet 551628

#2 · Best Hardware Set

2. Yoursme SBC-to-LS Plates

• Weight: 1.01 kg
• Material: Aluminum

Best for: SBC-to-LS reuse of mounts.

Why it ranks #2: Designed to bolt an LS engine into a small-block Chevy vehicle using existing mounts; the package lists two plates, eight flat-head bolts and six flange bolts.

Reusing existing small-block Chevy mounts is the defining purpose of these Yoursme plates, enabling an LS-series engine to bolt into a vehicle originally equipped with an SBC. The kit also specifies a 0.17-inch upward crankshaft-centerline shift, a useful fitment detail for planning the conversion.

The two aluminum adapter plates are M10-threaded and come with eight flat-head bolts and six M10-1.5 flange bolts, giving the buyer a specified hardware set for the mount connection. Their stated function is to use existing SBC mounts with an LS engine, which can simplify the mounting workflow compared with replacing that mounting arrangement. The plates move the crankshaft centerline up 0.17 inches, a change to account for when evaluating engine position in the vehicle.

Skip it if you need a plate for a Predator-powered mini bike; GZZTORES's Predator 79cc-to-212cc mount targets that application.

This kit suits a builder retaining existing small-block Chevy mounts while installing an LS-series engine. Account for the specified 0.17-inch centerline rise, and keep the stated SBC-to-LS conversion direction in view.

Listed on Amazon as: for LS Swap Motor Mounts Adapter Plates – Universal Swap Bracket Small Block LS Conversion Adjustable Fit for LS1 LS3 LS2 LQ4 LQ9 LS6 L92 L99 L33 LR4 Billet Aluminum for SBC Vehicle to LS Engine

#3 · Best CNC-Milled

3. Mejiao LS Swap Plates

• Weight: 1.01 kg
• Material: Aluminum
• Dimensions: 7 x 4 x 0.7 in

Best for: CNC-milled LS swap plates.

Why it ranks #3: CNC-milled aluminum plates target small-block Chevy-to-LS swaps and specify OEM-style fitment plus a 0.17-inch crankshaft centerline change.

CNC-milled aluminum plates and an OEM-specification fit focus this Mejiao kit on moving an LS-series engine into a vehicle originally equipped with a small-block Chevy. The stated 0.17-inch crankshaft-centerline rise gives builders a specific positioning change to consider during swap planning.

The plates are described as CNC milled from aluminum, a manufacturing detail tied to the product's stated goal of accurate fitment. Their function is to bolt an LS engine into a vehicle with an original small-block Chevy setup, connecting the plates to a defined conversion rather than a universal engine mount. The 0.17-inch upward centerline shift affects engine placement, so it is a relevant measurement to account for when considering the vehicle's existing arrangement.

Skip it if you require stated included mounting bolts; ICT Billet's SBC-to-LS kit lists its plates and hardware contents.

This Mejiao kit fits builders converting a small-block Chevy vehicle to an LS engine who want CNC-milled plates. Consider the stated 0.17-inch centerline rise as part of your engine-position planning.

Listed on Amazon as: for LS Swap Motor Mounts Adapter Plates – LS Conversion Adjustable Universal Swap Bracket Small Block Kit for LS Engine, LS1 LS3 LS2 LQ4 LQ9 LS6 L92 L99 L33 LR4 Billet Aluminum

#4 · Best Model Detail

4. YESHMA SBC-to-LS Plates

• Weight: 1.07 kg
• Material: Aluminum
• Dimensions: 8.25 x 4.25 x 0.17 in

Best for: Classic Chevy LS swap fitment.

Why it ranks #4: Lists LS Gen III/IV compatibility and names Chevy cars and 2WD trucks; it also states a limitation for low-mount AC compressors.

Compatibility with LS Gen III and IV engines from 1997–2013 makes this YESHMA plate set a targeted option for SBC-to-LS swaps. It uses existing mounts and names classic Chevy cars and 2WD trucks among its applications, while explicitly excluding low-mount AC compressors.

The plates allow an LS engine to mount on a vehicle's stock SBC bracket with existing mounts, a direct workflow for the stated conversion. The listed Gen III/IV engine range and named Camaro, Nova, Chevelle, Impala, and classic Chevy applications help define the intended fitment. Plates, bolts, and washers are included. The low-mount AC compressor exclusion is an important boundary to check when that accessory arrangement is part of the vehicle setup.

Skip it if you need a listed Predator 670-to-Kohler drivetrain adapter; DULUPLOSPA's Predator 670 plate addresses that engine pairing.

Choose YESHMA for a listed classic Chevy SBC-to-LS conversion using existing mounts. Its Gen III/IV range and low-mount AC compressor exclusion are key fitment boundaries to weigh for your vehicle.

Listed on Amazon as: LS Swap Motor Mounts Adapter Plates for SBC to LS Conversion

#5 · Four-Position Kit

5. SHLPDFM LS Swap Kit

• Weight: 0.94 kg
• Material: Aluminum

Best for: Multi-position LS swap kit.

Why it ranks #5: Lists compatibility with multiple LS engines and Chevy models, describes a milled plate opening for clearance, and includes plates and mounting hardware.

Four-position adjustment and a center opening milled for clearance define this SHLPDFM LS conversion kit. It targets LS engines in Chevy applications, including many 1960s and 1970s pickups, and states that the opening avoids grinding for a flush fit.

The listed compatible engines span LS1, LS2, LS3, LS6, LSX, LQ4, and LQ9, with several displacement families also specified. Four-position adjustment gives builders mounting choices within the listed conversion context, while the milled center opening is intended to clear the engine for a flush fit without grinding. The package description lists two adapter plates, eight flat-head bolts, and six M10-1.5 flange bolts, supporting the specified installation hardware workflow.

Skip it if you need a Predator 212 mini-bike mount rather than automotive LS plates; GZZTORES's plate lists small-bike compatibility.

This kit suits builders fitting listed LS-family engines into Chevy applications who value position choices and the milled clearance opening. Confirm that your vehicle falls within its stated Chevy conversion scope.

Listed on Amazon as: 16 PCS/Set LS Engine Mounts Adapter Plates 4 Position LS Conversion Swap Kit Fits for GM & Chevy & Cadillac with a Small Block for S1 LS2 LS3 LS6 LSX LQ4 LQ9

#6

6. joytrace Predator 670 Adapter

• Dimensions: 9 x 2.1 x 0.87 in

Best for: Predator 670 Kohler conversions.

Why it ranks #6: Specifically converts Predator 670 V-Twin engines for Kohler Command setups and includes a billet aluminum adapter and riser plate.

Compatibility with Predator 670 V-twin engines and Kohler Command setups gives this joytrace adapter a specific conversion role. The listing also identifies replacement of older Kohler K-Series engines, making it relevant to owners connecting Predator 670 performance parts within those named engine arrangements.

The kit includes a billet aluminum adapter and a riser plate, two components that give buyers a defined set for the stated Predator 670-to-Kohler setup. Its precision-machining description emphasizes alignment, a practical consideration when adapting engine components. The listing also extends its stated use to replacing older Kohler K-Series engines, so buyers can assess both the Command setup and that older-series replacement scenario against their project before choosing.

Skip it if you need a 212 mini-bike mount with slots for drivetrain alignment; WnSEu's Coleman 100 plate lists that adjustment.

This kit suits a Predator 670 conversion involving Kohler Command components or an older Kohler K-Series replacement. Its listed scope is engine-specific, so it is not a general mini-bike or LS swap plate.

Listed on Amazon as: Flywheel Adapter Compatible with Predator 670 Kohler Command

#7

7. DULUPLOSPA Predator 670 Adapter

• Weight: 11.2 oz

Best for: Predator 670 Kohler repowers.

Why it ranks #7: Designed to connect a Predator 670cc V-Twin to an existing Kohler drivetrain, making its stated use specific to equipment repowering.

A stated connection between a Predator 670cc V-twin and an existing Kohler drivetrain makes this DULUPLOSPA adapter relevant to equipment repowering. Its 6061-T6 billet aluminum construction is identified in the title, while the description emphasizes handling regular V-twin torque and vibration.

The plate is intended to connect the Predator 670 to an existing Kohler drivetrain, giving equipment owners a defined repowering path that may extend the machine's service life. The 6061-T6 billet aluminum specification identifies its material, and the description ties its high-hardness construction to regular torque and vibration from V-twin operation. The supplied information does not give dimensions or a hardware list, so installation planning must rely on the stated engine and drivetrain pairing.

Skip it if you need a listed riser plate alongside the adapter; joytrace's Predator 670 kit explicitly includes an adapter and riser plate.

This plate suits equipment owners repowering a Kohler-drivetrain machine with a Predator 670 V-twin. The stated pairing is specific, and the supplied details leave dimensions and included installation hardware unspecified.

Listed on Amazon as: Predator 670 to Kohler Engine Universal Adapter, 6061-T6 Billet Aluminum V-Twin Engine Swap Conversion Plate, Replacement Performance Parts for Kohler Command Series

#8

8. WnSEu Mini Bike Plate

• Weight: 0.69 kg
• Material: Aluminum
• Dimensions: 7.5 x 6 x 0.38 in

Best for: Adjustable mini-bike chain alignment.

Why it ranks #8: Fits listed mini-bike and go-kart applications with several small four-stroke engines; slotted adjustment helps align chains, belts or driveshafts without drilling.

Slotted mounting positions let this WnSEu plate adjust engine alignment for chains, belts, or driveshafts without drilling. That makes it a practical option for supported mini-bike and go-kart conversions where drivetrain alignment matters, including Coleman 100 and Doodlebug DB30 applications.

The aluminum plate lists compatibility with Coleman 100 and Doodlebug DB30 vehicles, plus small four-stroke engines including Honda, Tillotson 212, Predator 212, Briggs & Stratton, and Tecumseh. Its adjustment slots support alignment of chains, belts, and driveshafts without drilling, which can make positioning the engine more adaptable during installation. The hardware kit is included, while the product listing explicitly says installation instructions are not provided; buyers should be prepared to work through setup without a supplied guide.

Skip it if you need a supplied installation guide; the WnSEu listing explicitly says instructions are not included.

Pick this plate for a supported mini bike or go-kart conversion where slot-based drivetrain alignment is useful. Its listed engine and vehicle compatibility matters, and installation requires proceeding without included instructions.

Listed on Amazon as: Aluminum Motor Engine Adapter Plate For Mini Bike Go Kart for Coleman 100

#9

9. GZZTORES Predator Mount Plate

• Dimensions: 7 x 5 x 0.5 in

Best for: Predator 212 mini-bike upgrades.

Why it ranks #9: Supports a Predator 212 upgrade on listed mini bikes including Coleman CT100U, Baja DB30 and Motovox MBX10, using a billet aluminum plate.

Compatibility with Predator engines from 79cc to 212cc gives this GZZTORES plate a clear role: adapting supported mini bikes for a Predator 212 engine installation. Its listed fit includes the Coleman CT100U, Baja DB30, and Motovox MBX10, making it relevant to owners working within those small-bike platforms.

The 7-by-5-inch billet aluminum plate is specified for small four-stroke engines and named mini-bike models, so buyers can narrow the choice to a documented platform rather than a general engine swap. The product facts describe installing the plate on a mini bike before fitting a Predator 212, connecting the adapter to a 79cc-to-212cc upgrade workflow. Its compact listed dimensions also provide a concrete reference when assessing the mounting area, though the supplied information does not give hole spacing.

Skip it if you need a documented LS-to-SBC vehicle swap; ICT Billet's SBC-to-LS plates address that different conversion.

Choose this plate for a listed mini bike when fitting a Predator 212 is the goal. Its compatibility centers on small-bike and go-kart applications, so it is not the choice for an automotive LS conversion.

Listed on Amazon as: Mini Bike Engine Motor Mount Plate Adapter fit for Predator 79cc to 212cc

#10

10. JMCHstore Mini Bike Plate

• Weight: 0.83 kg
• Material: Aluminum
• Dimensions: 5 x 5 x 1 in

Best for: Broad mini-bike model coverage.

Why it ranks #10: Lists a range of mini-bike models and an aluminum mounting plate kit, but its stated fitment is narrower to small-bike swaps than the leading vehicle conversion plates.

A long list of named mini-bike models makes the JMCHstore mounting plate useful for owners checking a specific small-bike conversion. Its stated coverage includes FRP GMB100, Coleman B100 and RB100, Baja DB30, Motovox MBX models, and several Mega Moto platforms.

The aluminum mounting plate lists compatibility across 105cc-class bikes, Baja Doodle Bug variants, Motovox MBX10/11/12, and Mega Moto models, helping buyers compare their machine against named applications before planning installation. Its title identifies a Predator 212 swap, while the supplied feature list emphasizes model coverage and calls the product a direct bolt-on fit. The listed 5-by-5-by-1-inch dimensions offer a size reference, but the supplied facts do not provide slot or hole measurements.

Skip it if you need an adjustable plate specifically described for chain alignment; WnSEu's slotted mini-bike plate lists that feature.

Consider this plate if your machine appears among its extensive mini-bike and go-kart compatibility list and you are planning the titled Predator 212 swap. Check the named model coverage against your application.

Listed on Amazon as: Engine Mount Plate for FRP GMB100 B100 MBX10 Predator 212 Swap