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0403htp Chip 03 Z

This is the GM PROM chip. Fastchip sells off the shelf performance TPI chips for $159, with custom chips retailing for $399. Spark and fuel tables are altered in addition to speed limiters, transmission functions (if equipped with an automatic) and fan controls.
Fastchip Chip Install - Chips & Salsa

 This is the GM PROM chip. Fastchip sells off the shelf performance TPI chips for $159, with custom chips retailing for $399. Spark and fuel tables are altered in addition to speed limiters, transmission functions (if equipped with an automatic) and fan controls.  View Related Article

 

 

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