Hypertech Street Runner For 1991 Chevy Or Pontiac 305 TPI Automatic Transmission

• Increases Horsepower In Early Computer Controlled Cars
• Controls Engine's Air / Fuel Ratio And Spark Advance For Maximum Power And Performance
• Potential Gas Mileage Improvements
• Eighth VIN Character F

The Street Runner™ Power Chip is designed for daily street driving or competition in unmodified vehicles using a stock thermostat. Hypertech Power Chips are direct replacements for the stock chips in your 1991 Chevy or Pontiac. The Power Chip contains the Hypertech Power Tuning data that controls the engine's air / fuel ratio and spark advance for maximum power and performance plus, potential gas mileage improvements. 1981-1995 GM automotive computers used replaceable PROMs or chips to calibrate the Electronic Control Module (ECM) for specific engine, powertrain, and vehicle combinations. Hypertech created the original Power Chips™ to recalibrate these electronic brains for improved performance. As interest in Power Tuning™ grew and the variety of OEM systems increased, Hypertech developed innovative products to complement the increasingly complex on-board computer systems. From Camaro, Firebird, Malibu, Corvette, Caprice, Truck and other GM vehicles, we have what's right for you. Look for these brands to get your project running right! The Street Runner™ Power Chip is designed for daily street driving or competition in unmodified vehicles using a stock thermostat.