Our C4 Corvette Automatic Transmission Improvement Kit has all the features in the Shift Improver Kit plus it provides the driver manual control of their Corvettes automatic transmission. Most stock automatic transmissions won't downshift into low gear above 15 mph, and automatically upshift at a predetermined speed no matter what gear you're in. With the kit, you can downshift at any speed, and you can hold the transmission in first gear to any speed that you want! This is an asset when you've got a modified engine and you want additional RPMs. Manufactured by B&M, the C4 Corvette Automatic kit includes two modes of performance to select from: Heavy Duty, or Street/Strip.
Stage 1 - Heavy Duty
Firm positive shifts without loss of driver comfort for improved performance in all street vehicles. Recommended for regular passenger vehicles.
Stage 2 - Street/Strip
Provides very positive shifts for high performance street use or for competitive events. This model is for the enthusiast who wants the hardest, quickest possible shift.
Tech Note: Each Kit includes all Stage 1 (Heavy Duty) and Stage 2 (Street/Strip) components.