Holley HP EFI ECU and Harness Kits 550-602 harley-davidson-exhaust 6L V8 1975 - 1978

6L V8 1975 - 1978 GMC K25 Suburban   400/6

2012-2013 Dodge Challenger 392 CID

Intermediate Brake Line For 67 Ford Fairlane w/ Drum Brakes Steel

Notes: This system is for cars with factory exhaust bezels in the rear bumper

Holley HP EFI ECU and Harness Kits 550-602 harley-davidson-exhaust 6L V8 1975 - 1978HP ECU AND HARNESS LS1 & LS6 Looking for a plug and play kit for your GM LS engine? The HP ECU allows you to accurately control the fuel and ignition of your engine plus much more! Got a stock LS engine? Simply download a base map and you're on your way. Got a turbocharged, nitrous fed LS engine on water meth? This HP EFI kit can control that too! Stop reflashing your factory ECU every time you make a performance modification. Get Holley EFI today!