For all Holley MPI / TBI / Terminator EFI systems up to 600 HP GM Gas " Offers more data and functionality

Offers more data and functionality than instruments 5X the price

including hardened parallel washers

The Stage 6 package includes a Co-Pilot Transmission Lock-up Controller

Because Nothing Bites Like Gator

For all Holley MPI / TBI / Terminator EFI systems up to 600 HP GM Gas " Offers more data and functionalityThis kit is designed to allow the use for all Holley MPI TBI Terminator EFI systems on vehicles equipped with dual fuel tanks. The fuel injection systems require a fuel return line. In dual tank applications, the fuel must be returned to the tank from which it was drawn. Originally designed for all TBI 4 bbl Pro Jection and 950 MPFI 4 bbl TBI systems.