Patriot Header Flange - 0.375 in Thick - 2 in Round Port - Big Block Chevy - Pair 2010183 call them): Drive Hoop

call them): Drive Hoop

Fits Brake Boosters w/ 13/16" Hole for Grommet

Pressure Regulator / O-Rings

Aluminum flywheels and drive flanges are made from aircraft grade 7075 aluminum

Free rotation of the blade maintains a good

Patriot Header Flange - 0.375 in Thick - 2 in Round Port - Big Block Chevy - Pair 2010183 call them): Drive HoopPatriot 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