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Stainless Works long-tube headers for 2005–2010 Mustang GT use 1-3/4" primaries and include two 3" high-flow catalytic converters plus a 2-1/2" X-pipe to connect to the factory exhaust. Tubing is CNC mandrel bent and headers are TIG welded from 304 stainless steel with 3/8" thick flanges and smooth-flow collectors. Kits include four 24" O2 extensions and clamps for installation.
Stainless Works 2005-10 Mustang GT 1-3/4in Headers 3in High-Flow Cats X-Pipe Factory Connection
