American Powertrain Parts and Accessories

When it’s time to upgrade your transmission, turn to the torque transfer pros at American Powertrain! They specialize in Tremec 5- and 6-speed gearboxes and also...

When it’s time to upgrade your transmission, turn to the torque transfer pros at American Powertrain! They specialize in Tremec 5- and 6-speed gearboxes and also build a full line of accessories and installation kits designed to make your next swap go like clockwork. Summit Racing offers American Powertrain transmissions, transmission installation kits, crossmembers, flywheels, clutch pedal assemblies, and more—everything you need to convert your muscle car to modern drivetrain technology. Make the shift to American Powertrain—shop now!

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American Powertrain ProFit Tremec TKX Manual Transmission and Installation Kits for 1967-1969 CAMARO, FIREBIRD - COGM-F1FX

Transmission Combo, ProFit, Tremec TKX, 5-Speed, 2.87:1 First Gear, 0.68:1 Fifth Gear, GM, F-Body, 1967-69, Kit

Part Number: AWR-COGM-F1FX

Not Yet Reviewed

Estimated Ship Date: Today

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American Powertrain Hydramax Hydraulic Clutch Release Systems HMGM01101G

Throwout Bearing Conversion, Hydraulic, Hydramax, GM, TKO/TKX/Muncie/Saginaw/Richmond/Lenco, Kit

Part Number: AWR-HMGM01101SR

3.93 out of 5 stars ( 40 )

Estimated Ship Date: Today

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American Powertrain Hydramax Hydraulic Throwout Bearings CAGM-30001P

Throwout Bearing, Hydraulic, Buick, Chevy, Oldsmobile, Pontiac, Each

Part Number: AWR-CAGM30001P

3.8 out of 5 stars ( 10 )

Estimated Ship Date: Today

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American Powertrain Manual Transmission Bellhousings BHCV-10002K

Bellhousings, New, Aluminum, Natural, Manual, Chevrolet, Each

Part Number: AWR-BHCV-10002K

3.75 out of 5 stars ( 4 )

Estimated Ship Date: Today

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American Powertrain X-Factor Crossmembers XFGM-10101M

Transmission Crossmember, X-Factor, Steel, Black Powdercoated, Manual, Automatic, Chevy, Pontiac, Each

Part Number: AWR-XFGM10101M

4.6 out of 5 stars ( 10 )

Estimated Ship Date: Today

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American Powertrain Hydramax Hydraulic Throwout Bearings CAFO-30005HM

Throwout Bearing, Hydraulic, 3650, T-45, T-5, T-56, Tremec TKO, Ford, Each

Part Number: AWR-CAFO30005HM

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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American Powertrain Hydramax Master Cylinder Kits HMGM-30001G

Clutch Master Cylinder, Hydramax, Cast Aluminum, Black, Buick, Chevy, GMC, Oldsmobile, Pontiac, Kit

Part Number: AWR-HMGM30001SR

2.88 out of 5 stars ( 8 )

Estimated Ship Date: Today

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American Powertrain ProFit Tremec TKX Manual Transmission and Installation Kits for 1963-1967 CORVETTE - COGM-C2FX

Transmission Combo, ProFit, Tremec TKX, 5-Speed, 2.87:1 First Gear, 0.68:1 Fifth Gear, Chevy, Corvette, 1963-67, Kit

Part Number: AWR-COGM-C2FX

Not Yet Reviewed

Estimated Ship Date: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

American Powertrain Manual Transmission Bellhousings BHCV-10004K

Bellhousings, New, Aluminum, Natural, Manual, Chevrolet, LS III/IV, Each

Part Number: AWR-BHCV-10004K

Not Yet Reviewed

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American Powertrain Science Friction 180-Tooth Flywheel FWFO-10013

SCIENCE FRICTION Billet Steel 180T Flywheel for 351M/400M.

Part Number: AWR-FWFO10013

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Today

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American Powertrain Hydramax Hydraulic Clutch Release Systems for 1967-1970 MUSTANG - HMFO02601G

Throwout Bearing Conversion, Hydraulic, Hydramax, Ford, TKO/Magnum/T-56/Richmond/TR 3650, Kit

Part Number: AWR-HMFO02601G

3.0 out of 5 stars ( 4 )

Estimated Ship Date: Today

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American Powertrain Hydramax Hydraulic Clutch Release Systems HMGM01201G

Throwout Bearing Conversion, Hydraulic, Hydramax, GM, Magnum/GM LS T-56/Viper T-56, Kit

Part Number: AWR-HMGM01201SR

5.0 out of 5 stars ( 10 )

Estimated Ship Date: Today

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American Powertrain ISO-X Transmission Mounts ISGM-20002L

Transmission Mount, ISO-X, Low Profile, Polymer, Black, Buick, Cadillac, Chevy, GMC, Oldsmobile, Pontiac, Each

Part Number: AWR-ISGM-20002L

4.18 out of 5 stars ( 11 )

Estimated Ship Date: Today

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American Powertrain ProFit Tremec TKX Manual Transmission and Installation Kits for 1956-1962 CORVETTE - COGM-C1FX

Transmission Combo, ProFit, Tremec TKX, 5-Speed, 2.87:1 First Gear, 0.68:1 Fifth Gear, Chevy, Corvette, 1956-62, Kit

Part Number: AWR-COGM-C1FX

Not Yet Reviewed

Estimated Ship Date: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

American Powertrain Hydramax Hydraulic Clutch Release Systems for 1967-1969 CAMARO, FIREBIRD - HMGM40015

Hydraulic Throwout Bearing Conversion Kits, Hydramax Hydraulic Clutch Release Systems, Blue Aluminum Slave Cylinder, Reservoir, Chevy, Pontiac, Kit

Part Number: AWR-HMGM40015

Not Yet Reviewed

Estimated Ship Date: Mar 6, 2026 if ordered today

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Estimated Ship Date: Mar 6, 2026 if ordered today

American Powertrain Hydramax Hydraulic Clutch Release Systems for 1965-1966 MUSTANG - HMFO02503G

Throwout Bearing Conversion, Hydraulic, Hydramax, Ford, Toploader, 1 1/16 in. x 10-Spline, Kit

Part Number: AWR-HMFO02503G

Not Yet Reviewed

Estimated Ship Date: Today

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American Powertrain Transmission Yokes DSUN-10001

Yoke, Nodular Iron, 1330, Tremec, TKO's, Magnum's, Each

Part Number: AWR-DSUN-10001

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Today

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American Powertrain Hydramax Hydraulic Clutch Release Systems for 1967-1969 CAMARO, FIREBIRD - HMGM40014

Hydraulic Throwout Bearing Conversion Kits, Hydramax Hydraulic Clutch Release Systems, Push Type Slave Cylinder, Reservoir, Hoses, Chevy, Pontiac, Kit

Part Number: AWR-HMGM40014

Not Yet Reviewed

Estimated Ship Date: Mar 6, 2026 if ordered today