Multi-Port EFI Kits

Holley EFI LS (58X/4X) Engine Main Harness Extended for HP EFI/Dominator EFI 558-134 LS2/3/7+ (58x/4x) Engine Main Harness for HP EFI & Dominator EFI These harnesses are designed to fit most 24x and 58x LS engines, from 1997-2012. They are a...

Holley EFI LS (58X/4X) Engine Main Harness for HP EFI/Dominator EFI 558-103 LS2/3/7+ (58x/4x) Engine Main Harness for HP EFI & Dominator EFI This harness has been designed to interface with 58x crank and 4x cam sensors. These engines are commonly...

HP Tuners 15' Flying Lead Wiring Harness COR-HAR-003

HP Tuners Gen IV LS Drive-by-Wire EFI Wiring Harness 58x COR-HAR-002

HP Tuners Gen III LS Drive-by-Cable EFI Wiring Harness 24x COR-HAR-001

Holley GM Dominator Drive-by-Wire EFI Wiring Harness Early Truck 558-429 Dominator EFI GM DBW Harness-Early Truck. Compatible with GM part number 10379038. Only the following factory drive-by-wire throttle bodies have been pre-calibrated and...

Holley EFI LSX Injector Harness for EV6 Injectors HP EFI/Dominator/Terminator X 558-201 LSx Injector Harness for HP EFI, Dominator EFI and Terminator X.

Holley GM Dominator Drive-by-Wire EFI Wiring Harness 558-406 Plug and Play with Holley Throttle Pedal Part Number - 145-160 Designed to work with GM Throttle body P/N's - 12570790 and 12580760 Designed to work with GM Throttle Pedal P/N - 10379038...