Holley High Performance EFI ECU 554-113 distributor-vacuum-advance-line which creates the power to

which creates the power to stretch the clamp band tightly forming a strong butt joint

3L Power Stroke diesel can now be controlled by the Insight CTS3

Note: Requires cutting of the factory system

3 V8 2002 - 2004 GMC Sierra 1500 Denali 364/6 V8 1999 - 2004 Chevrolet Silverado 2500 364/6 V8 1999 GMC C1500 305/5 V8 2014 - 2015 Ram ProMaster 3500 183/3 L4 2009 - 2013 GMC Sierra 1500 Hybrid 364/6 V8 2001 - 2006 GMC Sierra 1500 HD 364/6 V8 2009 Hummer H3T Alpha 325/5

Holley High Performance EFI ECU 554-113 distributor-vacuum-advance-line which creates the power toHOLLEY EFI HP ECU 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