Check Valve Inline -4 an Blue / One Way Valve Air Filters All Proflow LS intake manifolds

All Proflow LS intake manifolds are avaliable in both LS1/LS2/LS6 and LS3/L92 intake port openings

It includes pinion pilot

Compatible with Most Car and Truck batteries including the following optima sizes: Red top: 34

AF3512-2000

One 3/8" NPT inlet

Check Valve Inline -4 an Blue / One Way Valve Air Filters All Proflow LS intake manifoldsPart Number: AF612 04 one way check valve. this one way check valve features a male an fittings oneither end in sizes ranging from 4 through to 16. The valve comes with a 1. 5psi spring installed and there is an optional 5psi spring where required. The length of the valve body is 29mm for the 4 to 8 or 35mm for the 10, 12 and 16 unit. available in blue, black and silver.