Multi-Port EFI Kits

Holley Terminator X Max GM LS Standalone ECU & Wire Harness 550-935T - 24x/EV1 Take control of your LS engine with Terminator X Max! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine,...

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

HP Tuners CORE ECU I/O Expansion Harness COR-HAR-005 This harness provides a flying lead solution to customers who want to add additional I/O to their install. Easily wire-in extra sensors, cooling fans, electric pumps, and more.

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

HP Tuners Gen III/IV LS Core ECU COR-ECU-000 Introducing HP Tuners standalone engine management solution, delivering superior control overyour vehicle's powerplant.CORE ECU is designed for all levels of LS swaps and high-performance motorsports builds...

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

HP Tuners Input/Output Expansion Harness I/O HARNESS