Patriot Header Flange - 0.375 in Thick - 2.5 in Round Port - Big Block Chevy (Pair) 011386 1-1/2 in Breather Tube to

1-1/2 in Breather Tube to 12 AN Male

Inlet & outlet tapped for 3/8" NPT

100-320 Degrees

Keeps Heat Out

Synchronizer Ring

Patriot Header Flange - 0.375 in Thick - 2.5 in Round Port - Big Block Chevy (Pair) 011386 1-1/2 in Breather Tube toProduct Description: Header Flange 0. 375 in Thick 2. 5 in Round Port Steel Natural Big Block Chevy Pair Patriot Exhaust products continue to offer the best value for the dollar of any brand in the industry. If you need components to build your own header and exhaust system Patriot Exhaust is the place to come! Mild steel, 304 stainless steel and aluminized bends are available in 1 1 4 to 4 diameters with a multitude of radius and wall thickness