Stainless Works long-tube headers for the 2004 Pontiac GTO use CNC mandrel-bent 1-3/4" primaries with CNC laser-cut 3/8" flanges and a 3" collector to optimize exhaust flow. Built from 304 stainless for corrosion resistance, these TIG-welded headers include 3" pipes to connect to the factory two-bolt flange and high-flow catted lead pipes. The design prioritizes fit and ground clearance and is covered by a lifetime warranty.
Stainless Works 2004 GTO Headers 1-3/4in Primaries 3in High-Flow Cats