Speed Engineering 1-7/8" Longtube Headers & X-Pipe Full Kit for 2004–2006 Pontiac GTO applications equipped with LS1 and LS2 engines.
This complete bolt-on system replaces the restrictive factory exhaust manifolds and mid-pipes with free-flowing stainless long tubes and a 3" off-road X-pipe that connects directly to the existing axle-back location. Designed for noticeable horsepower gains, aggressive exhaust tone, and long-lasting durability.
⚠️ Note: Rear (downstream) O₂ sensors are not used. A check-engine light for catalyst efficiency will appear and must be disabled via PCM tuning.
Kit Includes
- (1) Pair of stainless steel 1-7/8" Longtube Headers
- (1) 3" Off-Road X-Pipe / Connection Pipe
- (1) Set of Zinc-Coated Header Bolts (or stainless ARP bolts if selected)
- (2) MLS Exhaust Gaskets
- (2) O₂ Extension Harnesses
Plug Wires and Sleeves can be added to the kit if selected.
Speed Engineering Pontiac GTO longtube headers are made out of 304 stainless steel and offer great quality, performance, and affordability. Our GTO longtube headers are mandrel bent, tig welded, and feature natural stainless steel construction. All of our GTO longtube headers have been dyno proven. We stand behind our GTO longtube headers in saying you will not find a better fitting, quality built, budget header for your vehicle.
Features include:
- Mandrel Bent Tubing
- Full 1 7/8" Port Matched Primaries
- 3" Collector
- Longtube Header Design
- GTO LS1/LS2 Headers
- Gains over 25rwhp
- CNC Machined Flanges
- Natural Stainless Steel
- 5.7L/LS1, 6.0L/LS2 Engines
Applications:
2004 Pontiac GTO
2005 Pontiac GTO
2006 Pontiac GTO
Note: Will need our X-pipe kit for installing our headers.
(Warning) This is a RACE ONLY product manufactured and sold for installation on vehicles to be used solely for competition purposes. Once this part is installed, the vehicle may never be used, or registered or licensed for use, on a public road or highway. If you install this part on your vehicle and use the vehicle on a public road or highway, you will violate the Clean Air Act 203(a)(3), 42 U.S.C, 7522(a)(3) and may be subject to personal civil or criminal liability.