STANDARDEasy To Install For Cars With TH350 Transmission Made In USA J.W. Performance Transmission shift improver kits are a great cost effective way to increase the performance for your automatic transmission. The street action kit improves your Chevy application, substantially increases line pressure, and removes the delay out of the shift.
| Make | Model | Years |
| Chevrolet | Bel Air | 1958 - 1981 |
| Chevrolet | Biscayne | 1958 - 1972 |
| Chevrolet | Brookwood | 1958 - 1972 |
| Chevrolet | Caprice | 1966 - 1985 |
| Chevrolet | Del Ray | 1958 |
| Chevrolet | Impala | 1958 - 1985 |
| Chevrolet | Kingswood | 1959 - 1972 |
| Chevrolet | Nomad | 1958 - 1961 |
| Chevrolet | Parkwood | 1959 - 1961 |
| Chevrolet | Sedan Delivery | 1958 - 1960 |
| Chevrolet | Townsman | 1969 - 1972 |
| Chevrolet | Yeoman | 1958 |
