FAST XFI Fuel Injector Harnesses feature clearly labeled Weather Pack connectors and plug into FAST XFI Main Harnesses to designate your engines specific firing order.
Injector Harness Part Number 301209
USCAR Injector Connectors
Firing Order 1-8-7-2-6-5-4-3 - works with:
GM Gen III Engines (LS2, LS3, LS7)
*All harnesses will also work with the original "Classic" FAST™ Electronic Fuel Injection.