6-speed kit for C3 Corvette

SKU: PFGM-30005 Category: Tag:

ProFit MAGNUM Installation Kit for 68-82 C3 Corvette

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If you don't know what you need, call our technical sales staff at 931-646-4836


American Powertrain Pro-Fit Magnum 6-speed kit for C3 Corvette

The Ultimate Overdrive for C3 Corvette

  • 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

Kit includes:

  • White Lightning Offset Shifter Mechanism – Solid billet construction, bias adjustable
  • Seamless DOM Driveshaft Assembly – Race Balanced, Solid U-Joints
  • Patented exclusive Billet Face Flange Yoke – Bolts in for easy installation
  • Custom crossmember looks factory when installed. Makes working on the transmission and engine much easier. 
  • Transmission Mount – Polyurethane
  • Pilot Bearing – Stainless rollers, grease pre-pak
  • Modular Reverse Light Harness
  • Modular Reverse Lock-Out Harness
  • Speedometer Conversion – Mechanical or Electronic
  • Hardware, Instructions, Warranty and Customer First Extended Hours Tech Support
  • NOTE: Requires small tunnel modification for installation custom panel for modification is included. Features original shift position.
    Optional Muncie Bell Adapter Plate Sold Separately


Optional Parts:

  • Hydramax Hydraulic Clutch Conversion
  • Bell housing
  • OE Style Corvette T-handle shifter

Weight: 24 lbs

Dimensions: W4" x H15" x L15"

If you don't know what you need, call our technical sales staff at 931-646-4836