HP EFI ECU & Harness Kits - 550-601N universal-fittings-and-adapters 4L V8 1973 - 1974

4L V8 1973 - 1974 Chevrolet Blazer   454/7

5L L5 2013 - 2014 Volkswagen Passat Wolfsburg Edition 151/2

Metripack De-pinning tool

50-inch polished 304 stainless steel tip

HP EFI ECU & Harness Kits - 550-601N universal-fittings-and-adapters 4L V8 1973 - 1974Overview: Looking for a plug and play alternative for your stock or built late model factory EFI engine? How about a replacement ECU for your older Holley C950? Holley has you covered. HP EFI ECU and harness kits are designed to be used with popular factory EFI engines as an alternative to the factory ECU and harness or as a replacement for your C950 ECU. The HP allows you to accurately control the fuel and ignition of your engine along with