1968-1976 Turbo Hydra-Matic TH400 Shift Improver Kit
Our C3 Corvette Automatic Shift Improver Kits are the easiest way to get the stout performance you've always wanted from your Automatic Transmission equipped C3 Corvette. Manufactured by B&M each Shift Improver Kit includes two modes of performance to select from: Heavy Duty, or Street/Strip. In an afternoon, you can turn your transmission into a B&M-tuned unit! Best of all, you don't even have to remove the transmission.
- Two Performance Modes:
- Works With Automatic Transmission
- No Transmission Removal Required
Also known under these part numbers: (For reference only)