Holley

These are harnesses for the use of Holley's Terminator X, Terminator X Max, HP, and Dominator.

  • These are parallel harnesses that retain the GM ECU in the vehicle to keep the GM LAN and GM Body Control Module operating.
  • The Holley is wired to fully control injectors, coils, fuel pump, fans and boost control. 
  • DBW throttle control remains with the GM ECU to maintain operation of the GM Body Control Module.
  • Climate control, dash gauges, and automatic transmission control remains with the GM ECU.
  • The Holley Main Power harness (558-308) must be used with this Boomslang harness.
  • Holley Terminator X and Terminator X Max harnesses come with a Bosch 4.9 LSU wideband sub-harness.
  • Holley HP and Dominator harnesses come with a Holley LSU4/NTK  wideband sub-harness.
  • Fully plug and play. Easy to install. Easy to uninstall.
  • Saves time, hard-wiring costs, and your factory wire harness.

BOOMSLANG FABRICATION LLC PRODUCTS HAVE LEGAL RESTRICTIONS. READ THIS BEFORE INSTALLING/USING!

BOOMSLANG FABRICATION LLC PRODUCTS MAY BE USED SOLELY ON VEHICLES USED IN SANCTIONED COMPETITION WHICH MAY NEVER BE USED UPON A PUBLIC ROAD OR HIGHWAY, UNLESS PERMITTED BY SPECIFIC REGULATORY EXEMPTION.

IT IS THE RESPONSIBILITY OF THE INSTALLER AND/OR USER OF THIS PRODUCT(S) TO ENSURE THAT IT IS USED IN COMPLIANCE WITH ALL APPLICABLE LAWS AND REGULATIONS.

THIS POLICY ONLY APPLIES TO INSTALLERS AND/OR USERS WHO ARE LOCATED IN THE UNITED STATES.

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov