Patriot Header Flange - 0.375 in Thick - 2 in Round Port - Big Block Chevy - Pair R07C09YM Adjustable by-pass pressure using optional

Adjustable by-pass pressure using optional +10 psi and +15 psi springs

Made from high strength aluminum alloy with a corrosion and wear resistant Type III hard anodize finish

Lever handle petcock for easy draining

COMP Cams 3/8 Chrysler Valve Locks Steel 7 Degree

Patriot Header Flange - 0.375 in Thick - 2 in Round Port - Big Block Chevy - Pair R07C09YM Adjustable by-pass pressure using optionalPatriot Exhaust H7899 Header Flange Chevrolet Big Block 396 502 Tube Diameter 1 3 4" 2" Same As Port. Precision machined header flanges Heavy duty 3 8" thick material Supplied with our premium head gaskets A wide variety of tube diameters and port shapes available; Patriot Exhaust products continue to offer the best value for the dollar of any brand in the industry. This year's product offering presents sixteen new applications for popular muscle cars