American Racing: 2004 Pontiac GTO Long System, 1-3/4" x 3" or 1-7/8" x 3" (with or without cats)

ARH long tube headers long system for the 2004 GTO features 304 stainless steel in 1 3/4" or 1-7/8" primaries, 3" merge collectors, and all the necessary hardware and gaskets for a bolt-on installation. The 2004 GTO American Racing Headers long system was designed to bolt-on to your factory axle-back or any aftermarket axle-back. A simple cut and clamp modification (but no welding) may be required. Note: This system does not come with the x-pipe. Check out our X-PIPE OPTION GTO system.

• Product features on this system includes:

  1. 100% Made in the USA - Never Outsourced
  2. Made entirely of 304 stainless steel
  3. 3/8" thick laser-cut flanges for a warp-free seal
  4. Hand-ported TIG welded inlets
  5. Optimized primary tube routing for superior fit and performance
  6. Merge collectors with scavenger spikes
  7. Catted systems feature 200 cell metallic substrate catalytic converters for extreme durability