Add to Cart Quick view HP ECU & Harness LS1/LS6 NTK HOLLEY MSRP: Now: $2,564.95 Was: Engine Control Module - HP EFI - Wiring Harness - NTK Oxygen Sensor - 24x Reluctor Wheel - LS1 / LS6 - GM LS-Series - Each HLY550-602N
Add to Cart Quick view ECU & Wiring Harness LS2 HOLLEY MSRP: Now: $2,339.95 Was: Engine Control Module - HP EFI - Wiring Harness - 58x Reluctor Wheel - LS2 / LS3 / LS7 - GM LS-Series - Each HLY550-603
Add to Cart Quick view ECU & Wire Harness Unterminated HOLLEY MSRP: Now: $2,249.95 Was: Engine Control Module - HP EFI - Unterminated Wiring Harness - Universal - Each HLY550-605
Add to Cart Quick view Main Wiring Harness LS1 & LS6 HOLLEY MSRP: Now: $522.95 Was: EFI Wiring Harness - Main Harness - Holley HP / Dominator EFI - 24x Reluctor Wheel - LS1 / LS6 - GM LS-Series - Each HLY558-102
Add to Cart Quick view Ford MPFI HP ECU and Wire Harness Kit HOLLEY MSRP: Now: $2,249.95 Was: Engine Control Module - HP EFI - Wiring Harness - Ford Multi Port Fuel Injection - Each HLY550-606
Add to Cart Quick view SmartSpark LS1/LS6 Remote Mnt Wire Harness DAYTONA SENSORS MSRP: Now: $231.99 Was: Ignition Wiring Harness - SmartSpark - Remote Mount - Daytona Sensor SmartSpark Ignition System - LS1 / 6 - GM LS-Series - Each DAY119002
Add to Cart Quick view 98-02 GM LS1 Fuel Inj. Wiring Harness PAINLESS WIRING MSRP: Now: $549.99 Was: EFI Wiring Harness - GM LS-Series 1998-2002 - Kit PWI60508
Add to Cart Quick view ECU & Harness MPFI Kit HOLLEY MSRP: Now: $2,249.95 Was: Engine Control Module - HP EFI - Wiring Harness - V8 Multi Port Fuel Injection - Each HLY550-604
Add to Cart Quick view HP ECU & Harness MPFI - NTK HOLLEY MSRP: Now: $2,474.95 Was: Engine Control Module - HP EFI - Wiring Harness - NTK Oxygen Sensor - V8 Multi Port Fuel Injection - Each HLY550-604N