These headers have been proven time and time again for proper fit and durability. They feature extra thick flanges, miter cut 16 gauge tubes and are precision Mig welded to ensure a proper fit and eliminate exhaust leaks. Comes boxed complete with premium gaskets, all necessary mounting hardware and reducer cones. Cars equipped with power steering will require an adapter to lower the power cylinder. Available in black non Hi-Temp paint, unpainted and industrial nickel plated. Note: Cars with the larger Bell Housing to accomidate 164 Tooth Flywheels you may have to slightly dimple headers or remove a minimal amount of material from bell housing for clearance. The larger Bellhousing was original equipment on 302 cars but many cars have swapped out over the years. Dimensions: 1.5" Pimaries. 1.75" Secondaries. 2.5" Collectors.