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Holley Dominator & HP EFI LS1 Main Harness
510-558-102
Holley EFI wiring harnesses are used with Holley's Avenger, HP and Dominator EFI Systems. EFI harnesses for various Holley systems can consist of a main harness, transmission harness (if applicable), injector harness, ignition/coil harness, and auxiliary harnesses to access features of your Holley EFI system.
I have 5.3 out of 1999 Sierra gmc that I'm going to lsa swap. Will this harness work as long as I get an hp ecu or do I need the 58x
This harness will work with the proper ECU and matching reluctor.
Date published: 2018-08-01
Will this work with a cable drive throttle body
Yes, you can use this with a standard style throttle body.
Date published: 2018-06-26
Can I use this harness with a 5.3 lm7
This will work with any LS1 series engine.
Date published: 2018-05-02
Will this harness work for a boosted 5.3
Yes that will, but it is made to be used with an holley ECU.
Date published: 2018-04-28
Items You Need
Some parts are not legal for use in California or other states with similar laws / regulations
