Boomslang Holley Dominator (BF34999-DOM)

Description

Holley Dominator -“ Holley Plug-and-Play Parallel Harness Integration

The Holley Dominator is a popular choice for GM-based performance builds, and Boomslang supports Holley installations with plug-and-play (PNP) parallel harnesses engineered to retain the factory GM ECU in the vehicle while allowing Holley to control critical engine functions. This setup is ideal for engine swaps, turbo builds, supercharged combinations, and competition vehicles that need Holley control while keeping OEM vehicle network functions intact.

Boomslang Holley harnesses are designed as parallel harnesses that keep the GM ECU connected so the GM LAN and Body Control Module continue operating. The Holley ECU is wired to control injectors, coils, fuel pump, fans, and boost control, while drive-by-wire throttle control remains with the GM ECU to maintain BCM functionality. Climate control, dash gauges, and automatic transmission control also remain with the GM ECU.

Important Integration Notes

• The Holley Main Power Harness (558-308) must be used with this Boomslang harness.
• Holley LSU4/NTK wideband sub-harness included depending on ECU type.
• Fully plug-and-play, easy to install/uninstall, preserves factory wiring.
• Saves time and hard-wiring costs while improving serviceability.

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Important Legal Notice -“ Read Before Installing

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.