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Stainless Works long-tube headers for 2011–2014 Shelby GT500 deliver a direct-fit upgrade with 1-7/8" primaries and supplied lead pipes. Constructed from TIG-welded 304 stainless with 3/8" flanges and flow-matched oval ports, these headers use 3" OD slip-joint collectors with merge spikes. The kit includes 3" lead pipes with high-flow metal-matrix catalytic converters and a 3" H-pipe, fitting the factory connection for use with stock or Stainless Works exhaust.
Stainless Works 2011-14 Shelby GT500 Headers 1-7/8in Primaries High-Flow Cats 3in H-Pipe
