Holley EFI Benchtop Harness 558-127 AirFilters Attractive polyvinyl chloride (PVC) outer

Attractive polyvinyl chloride (PVC) outer jacket in smoked clear with red inserts and polished connectors

0L V8 1970 Chevrolet Chevelle Concours Estate 350/5

4L V8 390 CID or 7

GMC 1500 Series (1963)

Holley EFI Benchtop Harness 558-127 AirFilters Attractive polyvinyl chloride (PVC) outerFirmware Updating Dash Configuration ECU Testing Features: Terminated connectors for several EFI inputs1 Included power switch allows for a quick ? install? on your test bench2 Great for ECU diagnostics that do not require a running engine, firmware updates, or 7? dash calibrations3 Specs: Brand Holley EFI Emission Code 6 Product Type Harness Warning California Proposition 65 Application: Year Make Model Submodel