Hypertech

121112

Hypertech 121112 ThermoMaster Power Chip for 1991 C10/SS 454 TBI Auto

Engine Computers

Must run premium fuel
Plug in and go, no wiring or soldering required
50-state street legal
Use with 160 degree or 180 degree thermostat
Allows the vehicle's top speed to be matched to the speed rating of high-performance tires

Hypertech Power Chips are direct replacements for the stock chips in 1981-1995 GM vehicles. 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. Power Chips can be easily installed, using only hand tools. Thermomaster Power Chips are designed for daily street driving or competition in unmodified vehicles using a 160 degree or 180 degree thermostat.

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