Flowtech Exhaust products are the perfect combination of quality and value. We are proud to offer these Universal LS Swap Headers with 1-5/8 primaries and 2-1/2 collectors. These headers are made of 304 stainless steel and are available in both natural and polished finishes. Features: Universal rear exit shorty headers for GM LS1, LS2, LS3, LS6, LSX engines 1-5/8 mandrel bent primary tubes and 2-1/2 collectors 3/8 thick header flanges for a leak-free seal Premium gaskets and collector hardware included 2-1/2 reducers with oxygen sensor bungs included Available in natural 304 stainless steel and polished 304 stainless steel