Filters
Holley EFI 558-475
GM PWM Alternator Harness; For use with 2007+ PWM GM Alternators.
Holley EFI 558-127
Holley EFI Benchtop Harness; Firmware Updating - Dash Configuration - ECU Testing
Holley EFI 558-129
Holley EFI Gen V LT Engine Main Harness; For use with Terminator X and X Max
Holley EFI 558-130
Holley EFI LT4 Engine Main Harness; For use with Terminator X - Requires V3 Software
Holley EFI 558-140
Ford 7.3L Godzilla Main Harness for Stock Coils; Includes VVT and Oil Pump Connectors
Holley EFI 558-141
Ford 7.3L Godzilla Main Harness for Smart Coils; Includes VVT and Oil Pump Connectors on IGN1A Smart Coils
Holley EFI 558-469
2018-2022 Ford DBW Harness; Throttle Body - JL3E-9F991-AA - Throttle Pedal - BR3Z-9F836-D
Holley EFI 558-128
Holley EFI Ford Foxbody Main Harness; Plug and Play with fuel injected 5.0L Small Block Ford Engines
Holley EFI 558-133
LS1/6 (24x/1x) Engine Main Harness - Extended Length; For Dominator, HP, Terminator X and Terminator X Max ECU's
Holley EFI 558-134
LS2/3/7+ (58x/4x) Engine Main Harness - Extended Length; For Dominator, HP, Terminator X and Terminator X Max ECU's
