SKU: HLY558-305
UPC: 090127666784
MPN: 558-305
The Ford TFI Ignition Harness by Holley (model 558-305) is an essential wiring interface designed to connect your engine's factory ignition system to modern aftermarket ignition modules and engine management systems. This product is ideal for mechanics and automotive enthusiasts who are upgrading classic Ford vehicles or transitioning to electronic fuel injection systems.
Engineered to work with Ford's traditional TFI (Thick Film Ignition) connector architecture, this harness ensures reliable spark delivery and maintains proper signal integrity from the engine's crank sensor or distributor pickup coil to the ignition control module. The precision-molded connectors and shielded wire construction protect against electromagnetic interference, making it suitable for high-output ignition coils and computer-controlled fuel systems.
This harness is particularly beneficial for those undertaking engine swaps, carburetor conversions, or ignition system replacements, providing OEM-quality reliability with aftermarket flexibility. Its compact design allows for tidy routing in tight engine bays, making it compatible with first and second-generation Mustangs, Fairlanes, and mid-size Fords.
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