Stainless Works - Headers 2004 Pontiac GTO - Headers (Cats Included)

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.