Multiple U.S. Warehouse LocationsBroken ApexFree shipping on qualified orders over $100*
This HP Tuners offering is a GM E99 (ZR1) PCM upgrade that requires you to mail in your vehicle's PCM for modification. The service supplies a modified E99 ECM tailored for ZR1 applications and represents a purchase of a reprogrammed or modified engine control module. It is intended for owners seeking a calibrated ECM replacement using HP Tuners' ZR1-specific upgrade process.
HPT GM E99 (ZR1) PCM Upgrade (*Must Mail in PCM*)
