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FAST Classic 4-cylinder sequential main harness is built for Classic Systems on four-cylinder engines, providing the wiring required for sequential fuel injection. The harness routes injector and sensor signals to the ECU and is intended for use in Classic XFI installations where a 4-cylinder sequential setup is needed. It simplifies wiring by offering a purpose-built harness matched to Classic 4-cylinder EFI configurations.
FAST Wiring Harness W/Relay FAST
