Make more horsepower from your Awesome 13-14 Shelby GT 500 with this Header & Catted X-Pipe kit by Stainless Works. 2013-2014 Shelby GT500 1 7/8" headers and lead pipes. Tig welded 304 s/s 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. Includes 3" dia. lead pipes with high flow metal matrix catalytic converters and X-pipe. Fits factory connection point for use with factory or Stainless Works exhaust.