Free up exhaust flow on your GTO with Speed Engineering's 3" X-pipe kit. Built from 304 natural stainless steel with mandrel-bent tubing, TIG-welded construction, and 3" band clamps included. Dyno proven and designed to work with Speed Engineering longtube headers on LS1 and LS2 equipped GTO applications.
⚠️ Important Installation Notes:
- This X-pipe requires cutting the factory cat-back exhaust for installation
- This X-pipe is designed to work with Speed Engineering longtube headers only — it is NOT compatible with factory exhaust manifolds
Features:
- 3" Mandrel Bent Tubing — Consistent diameter throughout for maximum exhaust flow
- X-Style Crossover Design — Balances exhaust pulses between banks for improved tone and mid-range power
- 3" Band Clamps Included
- 304 Natural Stainless Steel Construction — Corrosion resistant, heat tolerant, and built to last
- Compatible with LS1, LS2, 5.7L, and 6.0L Engines
- Dyno Proven
Vehicle Applications:
Pontiac GTO — LS1/LS2
- 2004 Pontiac GTO — 5.7L LS1
- 2005 Pontiac GTO — 6.0L LS2
- 2006 Pontiac GTO — 6.0L LS2
Frequently Asked Questions:
Q: Will this X-pipe work with my factory exhaust manifolds? No. This X-pipe is designed to work with Speed Engineering longtube headers only. It is not compatible with factory exhaust manifolds.
Q: Does installation require cutting the factory cat-back? Yes. The factory cat-back exhaust will need to be cut for proper installation of this X-pipe.
Q: What size tubing does this X-pipe use? This X-pipe uses 3" mandrel bent tubing throughout with 3" band clamps included for installation.
Q: What engines is this X-pipe compatible with? This X-pipe is compatible with LS1 5.7L and LS2 6.0L engines found in 2004–2006 Pontiac GTO models.
Q: What material is this X-pipe made from? 304 natural stainless steel with full TIG-welded construction and mandrel-bent tubing.
Q: Is this X-pipe street legal? No. This is a race-only product intended for closed-course competition use only. Installation on a street-driven vehicle may violate the Clean Air Act (42 U.S.C. 7522(a)(3)).
⚠️ Race Use Only: This product is manufactured and sold for installation on vehicles used solely for competition. Once installed, the vehicle may not be used, registered, or licensed for use on a public road or highway. Installation on a street-driven vehicle may violate the Clean Air Act 203(a)(3), 42 U.S.C. 7522(a)(3).