Patriot (H8071-B) 1-5/8" x 3-1/2" Black Coating Hi-Temperature Roadster Exhaust Header for Street Rod Hi-Boy Small Block Chevrolet Chevy Small Block 265-400... 1-5/8'' Primary... 3-1/2''... Round Port... Hi-Temp Black Coating Outside frame exit.Can be used with any oil filter system or transmission and starter combination.Will fit most angle plug heads.All chrome headers are polished before and after assembly for show quality appearance.Note: The manufacturer of the product accompanying this document represents that it has not been found, nor is believed to be, unlawful for use under provisions of the Clean Air Act, per the manufacturers application guide. This product is not legal for sale...