2007-2010 Shelby GT500 1-7/8″ headers and lead pipes. Choose between high-flow catalytic converters or off-road pipes as well as an X-pipe or H-pipe. Tig welded 304 stainless steel headers with 3/8″ thick flanges and smooth flow collectors. Oval exhaust ports that are an exact match to the factory cylinder head. 3″ OD slip joint collectors with merge spikes.