Description
American Powertrain Pro-Fit Magnum 6-speed kit for 1977-90 GM B-body Cars
GM B-body cars never came with a manual transmission. We have a complete bolt in clutch pedal conversion for these cars now. Blow their minds with a stick in a big car!
30-50% increase in fuel economy
- Low RPM cruising for greatly reduced driver fatigue and an improved highway driving experience.
- Reduced engine wear leading to longer engine life
- Cooler engine operating temperatures
- Reduced NVH (noise – vibration – harshness)
Tremec T56 Magnum Gear Ratios
Close Ratio 2.66, 1.78, 1.30, 1.00, 0.80, 0.63
Wide Ratio 2.97, 2.10, 1.46, 1.00, 0.74, 0.50
26-spline clutch disk required
Tunnel Must Be Cut for 6-speed! Big Car…Small Tunnel
If you do not know what parts you need click here to get a quick quote or call our sales dept at 931-646-4836
Kit includes:
- Revo Offset Shifter
- Driveshaft Slip Yoke – Cryogenically hardened steel
- Bolt In G-Force B-Body Crossmember with Adjustable Mount
- Rolled Tunnel Patch
- Transmission Mount – Polyurethane
- Pilot Bearing – Stainless rollers, grease pre-pak
- Reverse Light Harness – Weatherseal
- Speedometer Conversion – Electronic
- Shifter Knob
- Shifter Handle
- Modular Reverse Lock-out Harness
- Modular Reverse Light Harness
- Hardware, Instructions, Warranty
Optional Parts:
- Hydramax Hydraulic Clutch
- Clutch Pedal
- Pilot Bearing
- Bell housing
- Flywheel


