Holley EFI ECU & Harness MPFI Kit SF52513 and patented Flex-Vent

and patented Flex-Vent

Well suited to heavy duty vehicles such as full size trucks

01 ppm in air

and have evolved beyond their strictly-utility beginnings

Sealant must be used on intake bolt threads if the threads extend into lifter valley or coolant passage

Holley EFI ECU & Harness MPFI Kit SF52513 and patented Flex-VentUniversal V8 Multi Point Fuel Injection, Includes Bosch Oxygen Sensor Holley is quickly becoming The New Standard In EFI! Holley's HP ECU is standard equipment on the 2013 2014 Chevrolet COPO Camaro and Holley's EFI throttle body powers every NASCAR Cup Series team. Top racers are making the switch to Holley EFI every day. Racers like Tom Bailey who set three new records and took the overall event win on the 2013 Hot Rod Magazine Drag Week and John