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.

Individual Parts

Part Groups

Results 1 - 25 of 137

SPEC Stage 3 Plus Clutch Kits SP843F-4

Clutch Kit, Stage 3 Plus, Carbon Composite, Full Face/Sprung Hub, Factory Five, SL-C, GTM, Rapier, Aspira, Kit

Part Number: SXC-SP843F-4

Not Yet Reviewed

Estimated Ship Date: Feb 3, 2026 if ordered today

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Estimated Ship Date: Feb 3, 2026 if ordered today

SPEC Stage 2 Plus Clutch Kits SP843H-4

Clutch Kit, Stage 2 Plus, Carbon/Semi-Metallic/Kevlar®, Full Face/Sprung Hub, Factory Five, SL-C, GTM, Rapier, Aspira, Each

Part Number: SXC-SP843H-4

Not Yet Reviewed

Estimated Ship Date: Feb 3, 2026 if ordered today

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Estimated Ship Date: Feb 3, 2026 if ordered today

SPEC Stage 1 Clutch Kits SP841-4

Clutch Kit, Stage 1, Organic, Full Face/Sprung Hub, Factory Five, SL-C, GTM, Aspira, Rapier, Kit

Part Number: SXC-SP841-4

Not Yet Reviewed

Estimated Ship Date: Feb 10, 2026 if ordered today

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Estimated Ship Date: Feb 10, 2026 if ordered today

SPEC Stage 2 Clutch Kits SP842-4

Clutch Kit, Stage 2, Kevlar®, Full Face/Sprung Hub, Factory Five, SL-C, GTM, Kit

Part Number: SXC-SP842-4

Not Yet Reviewed

Estimated Ship Date: Feb 10, 2026 if ordered today

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Estimated Ship Date: Feb 10, 2026 if ordered today

SPEC Stage 3 Clutch Kits SP843-4

Clutch Kit, Stage 3, Carbon Composite, 6-Paddle/Sprung Hub, Factory Five, SL-C, GTM, Rapier, Aspira, Kit

Part Number: SXC-SP843-4

Not Yet Reviewed

Estimated Ship Date: Feb 10, 2026 if ordered today

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Estimated Ship Date: Feb 10, 2026 if ordered today

SPEC Stage 4 Clutch Kits SP844-4

Clutch Kit, Stage 4, Carbon Composite, 6-Paddle/Unsprung Hub, Factory Five, SL-C, GTM, Rapier, Aspira, Kit

Part Number: SXC-SP844-4

Not Yet Reviewed

Estimated Ship Date: Feb 10, 2026 if ordered today

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Estimated Ship Date: Feb 10, 2026 if ordered today

SPEC Stage 5 Clutch Kits SP845-4

Clutch Kit, Stage 5, Sintered Iron, Full Face/Unsprung Hub, Factory Five, SL-C, GTM, Rapier, Apsira, Kit

Part Number: SXC-SP845-4

Not Yet Reviewed

Estimated Ship Date: Feb 10, 2026 if ordered today

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Estimated Ship Date: Feb 10, 2026 if ordered today

SPEC Tuned Billet Flywheels SGTMA

Flywheels, Factory Five Flywheel

Part Number: SXC-SGTMA

Not Yet Reviewed

Estimated Ship Date: Feb 5, 2026 if ordered today

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Estimated Ship Date: Feb 5, 2026 if ordered today

ATS Diesel Performance Torque Converters 302-950-2392

Five Star Torque Converter, Factory Stall Speed, Aisin AS69RC, 2013-Current RAM 6.7L Cummins

Part Number: APF-3029502392

Not Yet Reviewed

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ATS Diesel Performance Stage 1 Transmission Packages for 1990-1993 D250, D350 - 309-912-2116

Automatic Transmission, Stage 1, Billet Converter, Deep Pan, Aluminum Case, Purple, Dodge, Cummins, A618, RWD, Kit

Part Number: APF-3099122116

Not Yet Reviewed