HP ECU AND HARNESS LS2/3/7 WITH 58X CRANK SENSOR & USCAR INJ. HARNESS, NTK
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.
550-603N 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. Comes with NTK Wideband sensor instead of Bosch Wideband sensor
Injectors, fuel pumps, fuel lines and factory GM coil harnesses
Holley EFI Wiring Manual