COMPUTER CHIP THERMO MASTER Coil Springs a direct-fit upgrade for classic

a direct-fit upgrade for classic GM

raised rev limiters where safe

and internal components for reliable service

Sold as a complete set with required sleeves and washers

Fabricated from 2x3-inch 0

COMPUTER CHIP THERMO MASTER Coil Springs a direct-fit upgrade for classicThe COMPUTER CHIP THERMO MASTER (ref 6754) is a classic ECM performance upgrade from Hypertech that replaces your vehicle's stock calibration EPROM with a professionally tuned chip. For a wide range of GM, Ford, and Chrysler vehicles with OBD I and early OBD II ECUs, the ThermoMaster optimizes air fuel ratios, ignition timing, and rev limiters for real world power gains. It's the original plug in performance chip no wires, no modules, no guesswork.