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6L V8 221 CID
This bolt-on emissions-legal system for the 6
No more fighting the hard lines to try and get them installed
1971 - 1974 Chevrolet Impala
HP EFI ECU & Harness Kits - 550-605N Medium Margin 6L V8 221 CIDOverview: Looking for a alternative for your stock or built late model factory FORD 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 additional
