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Performance & Replacement Transmission & Drivetrain Parts

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Performance & Replacement Transmission & Drivetrain Parts

Building awesome horsepower is only part of the story. You need to deliver all that power to your car or truck’s wheels! We’ve got torque-hungry high performance automatic...

Building awesome horsepower is only part of the story. You need to deliver all that power to your car or truck’s wheels! We’ve got torque-hungry high performance automatic and manual transmissions for street and strip applications, torque converters and clutch sets, flexplates and flywheels, plus limited-slip differentials, spools, lockers, ring and pinion sets, driveshafts, U-joints, axles, bearings, C-clip eliminator kits, transfer cases, shift kits, and rebuild kits. We also have a wide selection of trans-brakes, shifters, cables, and accessories—everything you need to put the power to the ground, Summit style.

Building awesome horsepower is only part of the story. You need to deliver all that power to your car or truck’s wheels! We’ve got torque-hungry high performance automatic and manual transmissions for street and strip applications, torque converters and clutch sets, flexplates and flywheels, plus limited-slip differentials, spools, lockers, ring and pinion sets, driveshafts, U-joints, axles, bearings, C-clip eliminator kits, transfer cases, shift kits, and rebuild kits. We also have a wide selection of trans-brakes, shifters, cables, and accessories—everything you need to put the power to the ground, Summit style.

Showing In Stock Items. Show All 301 Items.

Individual Parts

Part Groups

Results 1 - 25 of 276

Cometic AFM Transmission Pan Gaskets C15265

Cometic AFM Transmission Pan Gaskets C15265

Cometic AFM Transmission Pan Gaskets C15265

Automatic Transmission Pan Gasket, AFM, Nitrile Rubber/Aluminum, Dodge, Jeep, Ram, ZF 8HP90, 8HP95, Each

Part Number: CGT-C15265

Not Yet Reviewed

Estimated Ship Date: Today

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Estimated Ship Date: Today

ATP Extension Housing Gaskets FG-104

ATP Extension Housing Gaskets FG-104

ATP Extension Housing Gaskets FG-104

Transmission Extension Housing Gaskets, Replacement, Paper, 6 Bolts, Ford, C4/C5, Each

Part Number: ATP-FG104

2.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Pioneer Automotive Valve Body Gaskets 749101-5

Pioneer Automotive Valve Body Gaskets 749101-5

Pioneer Automotive Valve Body Gaskets 749101-5

VALVE BODY GASKET

Part Number: PIO-749101-5

Not Yet Reviewed

Estimated Ship Date: Nov 16, 2026 if ordered today

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Estimated Ship Date: Nov 16, 2026 if ordered today

Cometic Gasket Powersports Oil Seal Kits for 1985-1986 ATC250R, 1986-1989 TRX250R - C7349OS

Made in the USA

Cometic Gasket Powersports Oil Seal Kits for 1985-1986 ATC250R, 1986-1989 TRX250R - C7349OS

Cometic Gasket Powersports Oil Seal Kits for 1985-1986 ATC250R, 1986-1989 TRX250R - C7349OS

HON ATC250R 85-86TRX250R 87-89

Part Number: CPG-C7349OS

Not Yet Reviewed

Estimated Ship Date: Nov 23, 2026 if ordered today

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Estimated Ship Date: Nov 23, 2026 if ordered today

Cometic Powersport Gaskets Oil Seals C7126OS

Made in the USA

Cometic Powersport Gaskets Oil Seals C7126OS

Cometic Powersport Gaskets Oil Seals C7126OS

Oil Seal Kit

Part Number: CPG-C7126OS

Not Yet Reviewed

Estimated Ship Date: Nov 23, 2026 if ordered today

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Estimated Ship Date: Nov 23, 2026 if ordered today

Cometic Powersport Gaskets Oil Seals OS430

Made in the USA

Cometic Powersport Gaskets Oil Seals OS430

Cometic Powersport Gaskets Oil Seals OS430

44X OIL SEAL

Part Number: CPG-OS430

Not Yet Reviewed

Estimated Ship Date: Nov 23, 2026 if ordered today

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Estimated Ship Date: Nov 23, 2026 if ordered today

Cometic Powersport Gaskets - Oil Seals for 2005-2021 YZ125, 2020-2021 YZ125X - C3105OS

Made in the USA

Cometic Powersport Gaskets - Oil Seals for 2005-2021 YZ125, 2020-2021 YZ125X - C3105OS

Cometic Powersport Gaskets - Oil Seals for 2005-2021 YZ125, 2020-2021 YZ125X - C3105OS

YAM YZ125 05-17 OIL SEAL KIT

Part Number: CPG-C3105OS

Not Yet Reviewed

Estimated Ship Date: Nov 23, 2026 if ordered today

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Estimated Ship Date: Nov 23, 2026 if ordered today

Cometic Powersport Gaskets Oil Seals C3085OS

Made in the USA

Cometic Powersport Gaskets Oil Seals C3085OS

Cometic Powersport Gaskets Oil Seals C3085OS

Oil Seal Kit

Part Number: CPG-C3085OS

Not Yet Reviewed

Estimated Ship Date: Nov 23, 2026 if ordered today

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Estimated Ship Date: Nov 23, 2026 if ordered today

Cometic Powersport Gaskets - Oil Seals for 2003-2006 WR450F - C3560OS

Made in the USA

Cometic Powersport Gaskets - Oil Seals for 2003-2006 WR450F - C3560OS

Cometic Powersport Gaskets - Oil Seals for 2003-2006 WR450F - C3560OS

Oil Seal Kit

Part Number: CPG-C3560OS

Not Yet Reviewed

Estimated Ship Date: Nov 23, 2026 if ordered today

...Loading

Estimated Ship Date: Nov 23, 2026 if ordered today

Cometic Powersport Gaskets - Oil Seals for 1986-1987 KX80, 1987 KX80 BIG WHEEL - C7029OS

Made in the USA

Cometic Powersport Gaskets - Oil Seals for 1986-1987 KX80, 1987 KX80 BIG WHEEL - C7029OS

Cometic Powersport Gaskets - Oil Seals for 1986-1987 KX80, 1987 KX80 BIG WHEEL - C7029OS

KAW KX80 G1, G2 86-87

Part Number: CPG-C7029OS

Not Yet Reviewed

Estimated Ship Date: Nov 23, 2026 if ordered today

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Estimated Ship Date: Nov 23, 2026 if ordered today

Cometic Powersport Gaskets Oil Seals OS391

Made in the USA

Cometic Powersport Gaskets Oil Seals OS391

Cometic Powersport Gaskets Oil Seals OS391

30X47X6 OIL SEAL

Part Number: CPG-OS391

Not Yet Reviewed

Estimated Ship Date: Nov 23, 2026 if ordered today

...Loading

Estimated Ship Date: Nov 23, 2026 if ordered today

Cometic Powersport Gaskets Axle and General Purpose Seals OS257

Made in the USA

Cometic Powersport Gaskets Axle and General Purpose Seals OS257

Cometic Powersport Gaskets Axle and General Purpose Seals OS257

Output Shaft Seal

Part Number: CPG-OS257

Not Yet Reviewed

Estimated Ship Date: Nov 23, 2026 if ordered today

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Estimated Ship Date: Nov 23, 2026 if ordered today

Cometic Powersport Gaskets - Oil Seals for 2004-2007 RM125 - C7508OS

Made in the USA

Cometic Powersport Gaskets - Oil Seals for 2004-2007 RM125 - C7508OS

Cometic Powersport Gaskets - Oil Seals for 2004-2007 RM125 - C7508OS

Oil Seal Kit

Part Number: CPG-C7508OS

Not Yet Reviewed

Estimated Ship Date: Nov 23, 2026 if ordered today

...Loading

Estimated Ship Date: Nov 23, 2026 if ordered today

Cometic Powersport Gaskets - Oil Seals for 1992-2004 KX250 - C7861OS

Made in the USA

Cometic Powersport Gaskets - Oil Seals for 1992-2004 KX250 - C7861OS

Cometic Powersport Gaskets - Oil Seals for 1992-2004 KX250 - C7861OS

Oil Seal Kit

Part Number: CPG-C7861OS

Not Yet Reviewed

Estimated Ship Date: Nov 23, 2026 if ordered today

...Loading

Estimated Ship Date: Nov 23, 2026 if ordered today

Cometic Powersport Gaskets - Oil Seals for 1990-2002 CR125R - C7010OS

Made in the USA

Cometic Powersport Gaskets - Oil Seals for 1990-2002 CR125R - C7010OS

Cometic Powersport Gaskets - Oil Seals for 1990-2002 CR125R - C7010OS

Oil Seal Kit

Part Number: CPG-C7010OS

Not Yet Reviewed

Estimated Ship Date: Nov 23, 2026 if ordered today

...Loading

Estimated Ship Date: Nov 23, 2026 if ordered today

Cometic Powersport Gaskets Oil Seals OS424

Made in the USA

Cometic Powersport Gaskets Oil Seals OS424

Cometic Powersport Gaskets Oil Seals OS424

40X62X6 OIL SEAL

Part Number: CPG-OS424

Not Yet Reviewed

Estimated Ship Date: Nov 23, 2026 if ordered today

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Estimated Ship Date: Nov 23, 2026 if ordered today

Cometic Powersport Gaskets Oil Seals OS405

Made in the USA

Cometic Powersport Gaskets Oil Seals OS405

Cometic Powersport Gaskets Oil Seals OS405

32x52x10 OIL SEAL

Part Number: CPG-OS405

Not Yet Reviewed

Estimated Ship Date: Nov 23, 2026 if ordered today

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Estimated Ship Date: Nov 23, 2026 if ordered today

Cometic Powersport Gaskets Oil Seals OS418

Made in the USA

Cometic Powersport Gaskets Oil Seals OS418

Cometic Powersport Gaskets Oil Seals OS418

32X62X7 OIL SEAL

Part Number: CPG-OS418

Not Yet Reviewed

Estimated Ship Date: Nov 23, 2026 if ordered today

...Loading

Estimated Ship Date: Nov 23, 2026 if ordered today

Cometic Powersport Gaskets Oil Seals OS400

Made in the USA

Cometic Powersport Gaskets Oil Seals OS400

Cometic Powersport Gaskets Oil Seals OS400

34.8X53X8 OIL SEAL

Part Number: CPG-OS400

Not Yet Reviewed

Estimated Ship Date: Nov 23, 2026 if ordered today

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Estimated Ship Date: Nov 23, 2026 if ordered today

Cometic Powersport Gaskets Oil Seals OS406

Made in the USA

Cometic Powersport Gaskets Oil Seals OS406

Cometic Powersport Gaskets Oil Seals OS406

32x52x8 OIL SEAL

Part Number: CPG-OS406

Not Yet Reviewed

Estimated Ship Date: Nov 23, 2026 if ordered today

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Estimated Ship Date: Nov 23, 2026 if ordered today

Cometic Powersport Gaskets Oil Seals OS209

Made in the USA

Cometic Powersport Gaskets Oil Seals OS209

Cometic Powersport Gaskets Oil Seals OS209

16X22X4 OIL SEAL

Part Number: CPG-OS209

Not Yet Reviewed

Estimated Ship Date: Nov 23, 2026 if ordered today

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Estimated Ship Date: Nov 23, 2026 if ordered today

Cometic Powersport Gaskets Oil Seals OS423

Made in the USA

Cometic Powersport Gaskets Oil Seals OS423

Cometic Powersport Gaskets Oil Seals OS423

32x62x5 OIL SEAL

Part Number: CPG-OS423

Not Yet Reviewed

Estimated Ship Date: Nov 23, 2026 if ordered today

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Estimated Ship Date: Nov 23, 2026 if ordered today

Cometic Powersport Gaskets Oil Seals OS371

Made in the USA

Cometic Powersport Gaskets Oil Seals OS371

Cometic Powersport Gaskets Oil Seals OS371

Decompression Shaft Seal 10x17x6

Part Number: CPG-OS371

Not Yet Reviewed

Estimated Ship Date: Nov 23, 2026 if ordered today

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Estimated Ship Date: Nov 23, 2026 if ordered today

Cometic Powersport Gaskets Oil Seals OS352

Made in the USA

Cometic Powersport Gaskets Oil Seals OS352

Cometic Powersport Gaskets Oil Seals OS352

Neutral Drum Oil Seal 15x25x5

Part Number: CPG-OS352

Not Yet Reviewed

Estimated Ship Date: Nov 23, 2026 if ordered today

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Estimated Ship Date: Nov 23, 2026 if ordered today

Cometic Powersport Gaskets Oil Seals C7736OS

Made in the USA

Cometic Powersport Gaskets Oil Seals C7736OS

Cometic Powersport Gaskets Oil Seals C7736OS

Oil Seal Kit

Part Number: CPG-C7736OS

Not Yet Reviewed

Estimated Ship Date: Nov 23, 2026 if ordered today

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Estimated Ship Date: Nov 23, 2026 if ordered today

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