Patriot Header Flange Kit - SB Chevy 3/8 Thick H762003S and 3/4"-16 fine thread gun-drilled

and 3/4"-16 fine thread gun-drilled

When the engine reaches your set rpm

On boosted applications

Direct performance replacement for Dodge 2

Petcock Included

Patriot Header Flange Kit - SB Chevy 3/8 Thick H762003S and 3/4"-16 fine thread gun-drilledPatriot Exhaust H7863 Header Flange Pair Chevrolet Small Block 265 400 Tube Diameter 1 5 8" Oval 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