Product#: PC11031

1981 Chevrolet 350 4bbl; Automatic Transmission; Hypertech Street Runner Chip

For use with stock vehicles which have not been modified. The Street Runner puts fun and excitement back in your driving and gives you the extra accelerating power you need for passing, pulling or maneuvering out of a tight...

Product#: PC11032

1981 Chevrolet 350 4bbl; Automatic Transmission; Hypertech Thermo Master Chip

For use with a stock exhaust system and a low temperature thermostat. The Thermo Master helps keep the engine cooler in situations of extreme heat such as desert driving, competition, etc. A low temp thermostat is required....