Best Adapter Plate For Engine Conversion for LS, LT, and Small Engines

#1 · Best Overall

1. ICT Billet SBC-to-LS Plate

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

Best for: USA-made SBC-to-LS plates.

Why it ranks #1: Purpose-built for SBC vehicles receiving LS engines, it uses 3/8-inch aerospace-grade billet aluminum and includes two plates and mounting bolts.

ICT Billet machines these SBC-to-LS adapter plates from 3/8-inch aerospace-grade, USA-produced billet aluminum in Wichita, Kansas. They let an LS-series engine use a vehicle’s existing small-block Chevy mounts, while the specified 0.17-inch crankshaft-centerline rise gives builders a concrete engine-position change to account for.

The plates are made to OEM specifications and cover a broad range of LS engines, including LS1, LS3, LQ4, and LQ9, supporting their use in an SBC-to-LS mount conversion. Their 0.17-inch centerline rise affects engine placement, so it is relevant when planning the swap around the vehicle. The package includes two plates, eight flat-head bolts, and six M10-1.5 flange bolts; the plates are M10 threaded and use the included hardware.

Skip it if you are adapting a Predator 670 to a Kohler drivetrain; the DULUPLOSPA plate is specifically listed for that swap.

Choose ICT Billet’s plates for an SBC-to-LS conversion where USA-produced 3/8-inch billet and the included M10 hardware fit the plan. Account for the 0.17-inch centerline rise when evaluating engine placement.

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 · Adjustable LS Fit

2. Yoursme LS Swap Plates

• Weight: 1.01 kg
• Material: Aluminum

Best for: SBC-to-LS mount conversion.

Why it ranks #2: Targets the same SBC-to-LS conversion, specifies a 0.17-inch crankshaft-centerline rise, and includes two plates with flat-head and flange bolts.

Existing small-block Chevy mounts can be retained when installing an LS-series engine, the defining purpose of Yoursme’s adapter plates. The kit covers a broad range of LS engines, including LS1, LS3, LQ4, and LQ9, and raises the crankshaft centerline by 0.17 inches in the vehicle.

The plates connect an LS-series engine to a vehicle originally equipped with a small-block Chevy engine, using the existing mounts to support this conversion path. Their stated OEM-specification fitment and 0.17-inch crankshaft-centerline rise are important installation considerations when planning engine position. The package includes two plates, eight flat-head bolts, and six M10-1.5 flange bolts; the plates are M10 threaded, and the supplied hardware is specified for use with them.

Skip it if you need a plate for a mini-bike or a transmission interface; this kit is specifically for an SBC vehicle-to-LS engine mount conversion.

Choose these Yoursme plates for an SBC-based vehicle retaining its existing mounts during an LS-series swap. The listed 0.17-inch centerline rise and LS engine coverage are key fit considerations; this is not a mini-bike or transmission adapter.

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

3. Mejiao LS Swap Plates

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

Best for: CNC-milled SBC-to-LS mounts.

Why it ranks #3: Designed for fitting LS engines into vehicles originally equipped with small-block Chevy engines, with CNC-milled aluminum plates and a stated 0.17-inch rise.

CNC-milled aluminum is the defining construction detail of Mejiao’s SBC-to-LS adapter plates. The brackets let an LS-series engine bolt into a vehicle originally equipped with a small-block Chevy engine, and their stated 0.17-inch crankshaft-centerline rise gives installers a specific positioning change to consider.

Mejiao specifies OEM fitment and CNC-milled aluminum for a plate set intended to connect LS engines with existing small-block Chevy mounts. This application makes the kit relevant to builders retaining the vehicle’s original mount arrangement rather than selecting a different engine-mount conversion route. The plates move the crankshaft centerline up 0.17 inches, so that change should be part of engine-position planning. Listed LS applications include LS1, LS3, LS2, LQ4, LQ9, LS6, L92, L99, L33, and LR4.

Skip it if you need an adapter for a mini bike’s chain or belt alignment; the WnSEu plate has adjustment slots for that use.

Mejiao’s plates suit an LS swap into a small-block Chevy vehicle when CNC-milled aluminum and the listed LS coverage match the build. Include the 0.17-inch centerline rise in your engine-position and mount 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 · Classic GM Fit

4. YESHMA LS Swap Plates

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

Best for: SBC LS swaps with fit limits.

Why it ranks #4: Lists compatibility with LS Gen III/IV engines and many older GM cars and 2WD trucks; the set includes plates, bolts, and washers.

YESHMA’s plates mount a Gen III or Gen IV LS engine on an SBC vehicle’s stock bracket using existing mounts. Their listed vehicle coverage includes many 1960s and 1970s Chevy cars and pickups, while an explicit low-mount AC compressor exclusion makes application screening essential before installation.

The plates are intended for LS-series engines from 1997–2013 and list vehicle applications spanning many older Chevy cars and pickups, plus GM cars and two-wheel-drive trucks from specified periods. That detail can help narrow whether the kit suits a particular swap before installation. The package includes plates, bolts, and washers, and the stated limitation is clear: it does not work with low-mount AC compressors. Check that restriction against the planned engine accessory arrangement.

Skip it if you are keeping a low-mount AC compressor; this plate is explicitly incompatible with that arrangement.

YESHMA’s kit fits builders checking an older SBC vehicle for a Gen III/IV LS conversion and wanting plates with bolts and washers included. The low-mount AC compressor exclusion is a decisive boundary for accessory-layout planning.

Listed on Amazon as: for LS Swap Motor Mounts Adapter Plates for SBC Vehicle to LS Engine LS1 LS2 LS3 LS6 LQ4 LQ9 L33 L92 L99 LR4, for LS Conversion Swap Bracket Adjustable Universal (Black)

#5 · LT Engine Swap

5. ICT Billet LS-to-LT Plates

• Material: Aluminum
• dimensions: 6 x 7 x 1 in

Best for: LS-vehicle to LT-engine swaps.

Why it ranks #5: Specifically replaces a GM LS Gen III/IV with an LT Gen V engine and locates the LT at the factory LS bellhousing and crankshaft position.

These ICT Billet plates place a Gen V LT engine in the factory LS bellhousing and crankshaft location. They address a specific conversion—replacing a GM LS Gen III or IV engine with a newer direct-injection LT V8—rather than a general SBC-to-LS mount swap.

Compatibility is listed for all V8 LT Gen V engines, including LT4, L83, and L86, making the plates relevant when moving from an LS-generation engine to an LT-generation V8. Locating the LT engine at the factory LS bellhousing and crankshaft positions can preserve those stated reference locations in the conversion workflow. The kit includes two adapter plates with bolts and uses USA-produced billet aluminum made in Wichita, Kansas.

Skip it if you are converting a small-block Chevy vehicle to an LS engine; ICT Billet’s SBC-to-LS plate is the application-specific option.

Choose this ICT Billet kit for a GM LS Gen III/IV vehicle receiving a V8 LT Gen V engine. Its factory LS reference locations are the key fit consideration; it serves a different conversion than SBC-to-LS plates.

Listed on Amazon as: ICT Billet – Engine Mount Adapter Plates – LS1 Vehicle to LT1 Engine 2014-Up Swap Bracket Conversion Motor Mount Plate Gen III / IV to LT Gen V LT4 L83 L86 551367

#6 · Transmission Adapter

6. JEGS Chevy-to-B.O.P. Plate

• Weight: 3.7 lb

Best for: Chevy-to-BOP transmission adapters.

Why it ranks #6: Supports a distinct engine-to-transmission conversion, listing Chevy small- and big-block engines with TH-350, TH-400, 700-R4, and 200-4R transmissions.

This JEGS plate joins Chevrolet engines with Buick, Oldsmobile, or Pontiac transmissions, and also supports the reverse pairing. Its extensive listed engine and transmission examples make it useful for planning a cross-family engine-to-transmission connection rather than an engine-mount conversion.

Compatibility includes small- and big-block Chevy engines such as the 283, 350, 454, and other listed platforms, plus B.O.P. transmissions including TH-350, TH-400, 700-R4, and 200-4R. That breadth helps buyers check whether the proposed engine and transmission families match the plate’s stated purpose. The package includes the adapter plate and all bolts and spacers required for installation, consolidating the listed mounting components for the connection.

Skip it if you need to mount an LS engine to existing SBC vehicle mounts; the Yoursme plate is specifically for that engine-mount conversion.

Choose this JEGS adapter when pairing a listed Chevrolet engine with a Buick, Oldsmobile, or Pontiac transmission, or vice versa. It is a transmission interface, so it does not replace vehicle engine-mount plates.

Listed on Amazon as: Engine to Trans Adapter Plate Chevy Engine to B.O.P. Trans

#7

7. REVOTUNE Predator 670 Kit

• Material: Billet Aluminum
• dimensions: 13.97 x 8.66 x 1.77 in

Best for: Predator 670 with crankshaft riser.

Why it ranks #7: Pairs a Predator 670 V-Twin with Kohler Command applications and includes a billet aluminum adapter, riser plate, and bolts.

A dedicated riser plate raises the Predator 670 crankshaft centerline to the same height as a Kohler Command engine. REVOTUNE’s kit combines that positioning piece with a billet-aluminum adapter, targeting Predator 670 replacements for Kohler Command engines and older Kohler K-Series swaps.

The stated fitment centers on Predator 670 V-twin engines replacing Kohler Command engines, with older Kohler K-Series swaps also listed. The riser plate brings the Predator crankshaft centerline to Kohler Command height, addressing engine positioning as part of the conversion rather than providing only an adapter. The flywheel adapter is machined from billet aluminum and described as lightweight and corrosion resistant. Included components are one adapter, one riser plate, and three bolts.

Skip it if you need only a Predator 670-to-Kohler drivetrain adapter without a specified riser; the DULUPLOSPA listing focuses on that connection.

REVOTUNE’s kit suits a Predator 670 swap where matching the Kohler Command crankshaft height is important, including listed K-Series applications. Its adapter-and-riser combination and three included bolts are worth considering in installation planning.

Listed on Amazon as: Engine Adapter Riser Plate Kit Compatible with Predator 670 V-Twin to Replace for Kohler Command Engine Swap, Includes Billet Aluminum Adapter, Riser Plate, Bolts

#8

8. DULUPLOSPA Predator-to-Kohler Adapter

• Weight: 11.2 oz

Best for: Predator 670 Kohler repowers.

Why it ranks #8: Addresses Predator 670-to-Kohler drivetrain repowering with a stated high-strength construction, though the supplied specifications do not list kit contents.

This adapter connects a Predator 670cc V-twin to an existing Kohler drivetrain, targeting equipment repowers rather than automotive engine swaps. Its stated purpose is to help extend equipment service life, while the listed high-hardness construction addresses the regular torque and vibration associated with V-twin operation.

The application is specifically framed around connecting a Predator 670cc V-twin engine with an existing Kohler drivetrain, making the intended repower path clear. The listing describes high-hardness construction intended to withstand regular V-twin torque and vibration, with stable performance for daily machine use. That combination is relevant to equipment owners replacing an engine while retaining the Kohler drivetrain. The supplied details do not specify a hardware package, so buyers should account for that when planning the installation.

Skip it if you need a kit that raises the Predator crankshaft to Kohler Command height; the REVOTUNE kit specifically includes a riser plate.

This DULUPLOSPA adapter suits equipment owners repowering a Kohler-drivetrain machine with a Predator 670cc V-twin. Its stated application is narrow, so confirm the planned drivetrain and engine pairing against that specific conversion.

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

#9

9. WnSEu Mini Bike Adapter Plate

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

Best for: Adjustable mini-bike engine swaps.

Why it ranks #9: Fits Coleman 100 and Doodlebug DB30 applications with several small four-stroke engines; slotted mounting allows adjustment for chain or belt alignment.

Slotted mounting positions let this WnSEu plate adjust chain, belt, or driveshaft alignment without drilling. That makes it a practical option for specified mini-bike and go-kart swaps, including Coleman 100 and Doodlebug DB30 applications, with compatible small four-stroke engines such as the Tillotson 212 and Predator 212.

The aluminum-alloy plate lists compatibility with Coleman 100 and Doodlebug DB30 mini bikes and go-karts, along with several small four-stroke engine families. Its slots allow adjustment to align chains, belts, or driveshafts without drilling, giving an installer some flexibility during drivetrain positioning. The listing says installation hardware is included, but also notes there are no installation instructions, so buyers should be prepared to work from their own installation knowledge or resources.

Skip it if you need printed installation guidance; this listing explicitly says instructions are not included, unlike a kit with supplied directions.

This WnSEu plate suits mini-bike or go-kart owners aligning a compatible small engine’s chain, belt, or driveshaft. Its adjustment slots avoid drilling, but the lack of installation instructions matters if you need step-by-step guidance.

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

#10

10. GZZTORES Mini Bike Mount Plate

• dimensions: 7 x 5 x 0.5 in

Best for: 79cc-to-212cc mini-bike upgrades.

Why it ranks #10: A narrow-use option for upgrading compatible mini bikes from 79cc to a Predator 212, rather than a general automotive engine conversion.

This GZZTORES mounting plate supports upgrading specified mini bikes from a 79cc engine to a Predator 212. Its listed applications include Coleman CT100U Trail 100, Baja DB30, and Motovox MBX10, giving owners of those small bikes a focused engine-mount conversion option.

The plate is listed for small four-stroke engines and names the Predator 212 alongside several compatible mini-bike models, including Coleman CT100U, Baja DB30, and Motovox MBX10. The product description specifically frames the use as installing the plate and then fitting a Predator 212 to upgrade from 79cc. Billet aluminum is specified for the bracket, with the listing describing it as strong and durable for supporting the engine. Verify that the bike and engine pairing matches the listed application.

Skip it if you are adapting a Predator 670 to a Kohler drivetrain; the DULUPLOSPA adapter is listed for that equipment repower.

This GZZTORES plate suits mini-bike owners planning a listed 79cc-to-Predator-212 upgrade on compatible models such as the CT100U or DB30. Its stated application is small-engine mounting, not automotive engine conversion.

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