Stainless Works 1-3/4″ Headers w/3″ Pipe & Cats, 2004 GTO

2004 GTO headers. CNC mandrel bent 1 3/4″ primaries, , CNC laser cut 3/8″ flanges, 3″ collector. Includes 3″ pipes to connect to factory 2 bolt flange. High flow metal matrix converters. The best GTO headers available-used by GM on their Orange “Woodward Cruise” GTO project. The best ground clearance and fit available. Combined with our 3″ exhaust and a proper tune, numerous customers have made over 35 RWHP and 35 FT# of torque over stock!!! Includes 02 sensor extensions required for installation.