HP ECU AND HARNESS LS2/3/7 WITH 58X CRANK SENSOR & USCAR INJ. HARNESS
ECU & Harness Kits Looking for a plug and play alternative for your stock or built GM LS2/3/7 late model factory EFI engine? Holley has you covered. HP EFI ECU and harness kits are designed to be used with popular factory GM LS2/3/7 EFI engines as an alternative to the factory ECU and harness.
550-603 GM LS2/3/7 with USCAR (EV6 Style) connector on inj. harness (uses factory GM coil harnesses) - 58x crank sensor
ECU, main harness, injector harness, and necessary sensors.
Injectors, fuel pumps, fuel lines and factory GM coil harnesses
Holley EFI Wiring Manual