Transmissions & Transmission Parts

Hughes Performance LS1 Flexplate Adapters

Hughes Performance LS1 flexplate adapters will allow you to use an older-style automatic transmission and torque converter on your LS1 engine. They are made of high-strength steel and feature a special tapered end for easy installation.

5.0 out of 5 stars ( 12 )

$79.99

Engine Works LS Flexplate Spacers

Engine Works LS flexplate spacers are high-quality steel adapters designed to achieve optimum spacing when installing a non-LS transmission to an LS-based engine. Attain proper clearance with Engine Works LS flexplate spacers.

Not Yet Reviewed

$56.21

McLeod RST Street Twin Clutch Kits

Intended for high-horsepower street fans, the McLeod RST Street Twin clutch kits are economically priced twin disc clutches that use your existing flywheel. Able to handle up to 800 hp, the RST Street Twin clutches remain completely street-drivable. The organic lined clutch discs provide smooth engagement with a soft pedal effort, making these clutch kits ideal for the street performance enthusiast. (For select vehicles where these clutches are not adaptable to your existing flywheel, a new flywheel is included in the kit.) Here are some additional features of the McLeod RST Street Twin clutch kits: * Alignment tool included * Lighter-than-stock pedal feel * Will bolt to factory flywheel * CNC-machined and anodized flywheel adapter ring * Organic disc facing for smooth and even clutch engagement with excellent release qualities * Low rotating mass for quick revs * Blanchard ground floater with multiple straps to reduce noise for streetability

4.49 out of 5 stars ( 84 )

$825.00

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$1,379.00

ARP Pro Series Flywheel Bolts

Pro Series flywheel bolts from ARP give you all that you need to bolt in your flywheel with confidence. They're much stronger than OEM hardware, forged from aerospace alloy, and are heat-treated prior to thread rolling and machining. These bolts feature an exclusive, flat 12-point head design and a larger-than-stock shank diameter for increased strength and improved flywheel register.

4.73 out of 5 stars ( 377 )

$32.99

ARP Pro Series Flexplate Bolt Kits

These premium-grade ARP Pro Series flexplate bolts are far superior to OEM hardware. Forged from aerospace alloy and heat-treated prior to thread rolling and machining, they feature an exclusive, flat 12-point head design and a larger-than-stock shank diameter for increased strength and improved register.

4.9 out of 5 stars ( 334 )

$26.99

FTI Performance SRL-3 Series Billet Triple Clutch Torque Converters

FTI Performance SRL-3 Series billet triple clutch torque converters are designed for engines with some serious power! They're engineered to be locked up under full throttle and can withstand some abuse. The billet lockup piston, triple bearings, and anti-ballooning impeller hub are designed to get the job done. These converters are available in different stall torque ratios and stall ratings to match your engine and transmission combination.

3.86 out of 5 stars ( 7 )

$1,429.00

RAM Powergrip Clutch Kits

RAM Powergrip clutch kits offer your vehicle the perfect blend of drivability and performance. This dual-purpose clutch kit will provide more clamping pressure over a stock unit and can handle power levels up to 550 hp. All Powergrip kits feature an increased clamp load pressure plate, providing crisp clutch engagement with only a slight increase in pedal effort. The Powergrip clutch disc features a combination dual-sided disc with RAM's premium organic facing material on one side and RAM's premium 900 series metallic facing material on the other side. This allows the Powergrip unit to deliver optimum street/strip performance. The RAM Powergrip discs also utilize an 8-spring hub to maximize disc strength and durability. All kits include the pressure plate, clutch disc, alignment tool, and release bearing where applicable.

4.21 out of 5 stars ( 52 )

$469.00

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$499.00

RAM HDX Clutch Kits

RAM HDX clutch kits are ideal for vehicles that will see mild street and occasional track use. These performance minded clutch kits will provide more clamping pressure over a stock unit and can handle power levels up to 450 hp. All HDX kits feature an increased clamp load pressure plate while providing smooth clutch engagement with only a slight increase in pedal effort. The HDX clutch disc features RAM's premium organic facing material for optimum performance. Most RAM clutch discs utilize an 8-spring hub to maximize disc strength and durability. All kits include the pressure plate, clutch disc, alignment tool, and release bearing where applicable.

4.55 out of 5 stars ( 65 )

$339.00

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$699.00

Meziere True Billet Flexplates

Meziere true billet flexplates are the superior choice for quality and precision. These key engine components are machined to exacting tolerances from 4340 round bar steel. Meziere's proprietary manufacturing process ensures the strongest gear teeth, the least runout, and best longevity on the market. All of the replacement flexplates are certified to at least SFI 29.2, and they're available for fitment on vehicles from 1955 and forward.

4.85 out of 5 stars ( 20 )

$587.31

RAM Powergrip HD Clutch Kits

RAM Powergrip HD clutch kits are the ultimate kit for extreme street and track performance. This race inspired clutch kit will provide more clamping pressure over a stock unit and can handle power levels up to 650 hp. All Powergrip HD kits feature an increased clamp load pressure plate, providing crisp clutch engagement with only a slight increase in pedal effort. The Powergrip HD clutch disc features RAM's premium 900 series metallic facing material on both sides. This allows the Powergrip HD unit to deliver maximum grip in an extreme high-horsepower street or racetrack application. These RAM Powergrip discs also utilize an 8-spring hub to maximize disc strength and durability. All kits include the pressure plate, clutch disc, alignment tool, and release bearing where applicable.

4.08 out of 5 stars ( 24 )

$569.00

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$579.00

Centerforce Dual Friction Clutch Kits

Centerforce dual friction clutches generate up to a 90 percent increase in holding capacity over stock systems. These clutch-and-disc sets are designed for engines producing high horsepower and big torque outputs. Perfect for 4WD vehicles, all Centerforce clutch systems provide smooth engagement and light pedal pressure without compromising high performance.

4.67 out of 5 stars ( 311 )

$713.95

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$1,175.95

Centerforce Billet Steel Flywheels

Centerforce billet steel flywheels are available for popular import and domestic vehicles, including trucks. They're CAD/CAM-designed and CNC-machined from billet steel for precise, no-hassle, bolt-in installations. No modifications are required in combination with either Centerforce clutches or other clutch assemblies built to OEM specs. These rugged flywheels are SFI-approved, so you know that you can count on them--on the street and on the track.

4.52 out of 5 stars ( 61 )

$419.95

RAM Hydraulic Release Bearings

RAM hydraulic release bearings offer maximum flexibility when setting up the clutch release system in your early or late model car or truck. RAM heavy-duty hydraulic bearings use larger, more robust O-rings, providing the ultimate in durability and long life when compared to factory and other aftermarket hydraulic systems. RAM hydraulic bearings are fully adjustable and are easy to set up with most aftermarket clutches, single or dual disc. RAM hydraulic bearings are also a great choice for use in your Tremec transmission conversion. Application specific bearing kits include every fitting, line, shim and adapter needed to connect directly to the factory master cylinder. RAM also offers other bearing styles with a wider 3.150 in. bearing face needed for 3 and 6 lever clutch applications. When only the best will do, choose RAM!

4.22 out of 5 stars ( 76 )

$385.00

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$439.00

Summit Racing™ Flywheel Bolt Kits

Summit Racing™ flywheel bolt kits are heat-treated to Grade 8 specifications, and have a reduced-profile hex head for clearance. Their black oxide finish resists rust and corrosion, and the kits include lock washers.

4.7 out of 5 stars ( 20 )

$17.99

Transmission Specialties Lock-Up Street/Strip Torque Converters

Transmission Specialties lock-up Street/Strip torque converters offer exceptional durability in all applications. Many feature a billet front cover, as well as furnaced- and Heli-brazed fins for added strength. No other lock-up converter offers this strength and durability at a similar price point. Select the Transmission Specialties lock-up Street/Strip torque converter best suited for your application. More product features, items, and specifications may include (model dependent): * New billet turbine splines * Computer balanced * Pressure leak tested * Three new Torrington bearings * XHD billet oversized lockup * XHD billet front cover

5.0 out of 5 stars ( 1 )

$633.69

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$1,005.00

Action Clutch Chromoly Lightweight Flywheels

Action Clutch flywheels are designed and tested to ensure the best quality and performance. They are SFI certified, which meets the top performance standards in the automotive and motorsports industries. Engineered for street and race applications, Action Clutch chromoly flywheels offer three major benefits: Low weight, low inertia, and high thermal capacity. Made from durable one-piece billet chromoly steel or chromoly steel forgings, they are specifically made for light- to high-tuned racing cars that see drag racing, drifting, autocross, street use, and rally events, and specifically designed for a reduction in weight and inertia for better engine response. Each flywheel has gone through—and passed--engineering tests up to 15,000 to18,000 rpms, and are heat treated for extreme durability, saving you money by resurfacing multiple times.

1.0 out of 5 stars ( 1 )

$340.00

McLeod 1400 Series Hydraulic Throwout Bearings

Behind the scenes, but still important—McLeod's 1400 Series hydraulic throwout bearings play a special role in the optimal performance of your vehicle. Their most versatile choice to fit most applications, the 1400 bearings slip right over the front collar of your transmission. They're self-adjusting, meaning that you'll never have to adjust them as your clutch wears—and they can be set for the proper mounting clearance needed. The bearings are made of the finest hard-anodized billet aluminum, and equipped with quality elbow swivel fittings and high-pressure stainless steel lines for extreme durability. What happens backstage is just as crucial as what happens out front to bring about a rousing performance. You can't see McLeod 1400 Series throwout bearings as they work, but the part they play is vital to optimize the performance of your mean street or strip vehicle.

3.86 out of 5 stars ( 37 )

$465.00

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$499.00

RAM Muscle Car Clutch Kits

RAM Muscle Car clutch kits are the perfect choice for mildly modified street cars and trucks where driveability is most important. RAM Muscle Car kits are popular for older restoration vehicles as well as late model cars and trucks with basic bolt on engine modifications such as headers and air intakes. These RAM kits offer super smooth clutch engagement and increased holding power with only a slight increase in pedal effort. All kits include the pressure plate, clutch disc, alignment tool, and release bearing where applicable.

4.46 out of 5 stars ( 78 )

$379.00

On Sale

B&M Holeshot Torque Converters

A higher-than-stock stall speed as delivered by these B&M Holeshot converters will provide several advantages and benefits to vehicles with modified engines. Many modifications, particularly big cams, tend to reduce low-end power and torque. These high-stall converters allow the engine to launch the car at higher rpm, where more torque is available. They're a very good choice for the typical street machine that is looking for better launch capability and more strength.

3.88 out of 5 stars ( 84 )

$1,075.95

$583.95

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$967.95

TCI Trans-Scat Valve Body Kits

TCI Trans-Scat valve body kits offer you two options: you can either have good, solid shifting that's well suited to towing, or you can have competition-style shifting. These kits eliminate slippage and lag, improve fuel economy, extend clutch life, and really improve the 2nd and 3rd gear shifts. In addition to delivering crisper shifting, they allow you to downshift on demand, and most will allow you to hold first gear for extended periods, such as when climbing long hills while towing. All kits give you the full range of normal automatic functions when in "drive."

3.4 out of 5 stars ( 20 )

$106.95

On Sale

Hays Street 450 Clutch Conversion Kits

Hays Street 450 clutch conversion kits are an excellent upgrade offering up to 30 percent more holding power (clamping force) over your stock clutch. They're designed for handling stock to mildly modified engines—up to 450 horsepower. If drivability along with a stock pedal feel are the leading factors for your application, then order the Hays Street 450 clutch conversion kit recommended for your specific vehicle and engine size. Features, items, and specs: * Smooth, chatter-free operation using top quality organic composite friction surface material * Upgraded damper springs * Pressure plate * Clutch disc * Throwout bearing * Alignment tool * Instructions

3.38 out of 5 stars ( 8 )

$799.95

Sikky Manufacturing Manual Transmission Adapter Kits

Sikky Manufacturing LSx to CD00x transmission adapter kits will allow you to use any of the CD00x (CD001-CD009 6-speed) transmissions behind any GM LS engine. This readily available 6-speed transmission can be found in the Nissan 350z, 370z, as well as the Infiniti G35 and G37. These kits do not require cutting off the bellhousing, making for a simple bolt-on installation with no flywheel spacers needed. When it comes to the best cost-to-performance automotive products available on the market, Sikky Manufacturing is the brand to rely on. Additional features: * The adapters are 100 percent machined, making for the most precise adapter plate available * Proper alignment of the input shaft and dowel pins ensures maximum reliability * Features the only SFI rated and balanced flywheel on the market for this conversion * Designed to use a 350Z clutch and pressure plate, so any off-the-shelf aftermarket or OEM clutch disc and pressure plate will work with the included flywheel * Kit comes with everything needed, including adapter plate, flywheel, pilot bearing adapter, and high-torque starter adapter

Not Yet Reviewed

$1,424.97

RAM Premium Replacement Clutch Kits

RAM premium replacement clutch kits are the first choice of professional installers, because each set contains the correct replacement parts to ensure proper fit and operation in your vehicle. Kits include an OEM diaphragm or lever style pressure plate, clutch disc, and a clutch-alignment tool. Some clutch sets will include a throwout bearing. The clutch disc features either a 5- or 6-spring standard hub or helix hub, just like the originals. These clutch sets are great for unmodified street vehicles and restorations. The flywheel must be resurfaced or replaced prior to installation to validate the warranty. RAM clutch kits are available in more than a hundred models for fitment on thousands of vehicle-specific applications.

4.25 out of 5 stars ( 93 )

$339.00

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$1,139.07

Centerforce LMC Pressure Plates

Centerforce LMC Series pressure plates are specifically designed to dramatically reduces engine rotating mass. These lightweight, SFI approved competition pressure plates are intended with most road racing and circle track applications in mind. Centerforce machines these special pressure plates from high-strength aircraft-grade billet aluminum and they use their patented ball bearing actuated diaphragm and centrifugal weight system for maximum grip while maintaining a comfortable and controllable clutch pedal. When used in conjunction with Centerforce's aluminum flywheels, LMC series brings the term light weight to an unparalleled level.

5.0 out of 5 stars ( 2 )

$734.99