Silverado & Sierra 1 3/4" Longtube Headers 1999-2006

(In Stock)

Speed Engineering Silverado & Sierra longtube headers are made out of 304 stainless steel and offer great quality, performance, and affordability. Our Silverado & Sierra longtube headers are mandrel bent, tig welded, and feature natural stainless steel construction. All of our Silverado & Sierra longtube headers have been dyno proven. We stand behind our Silverado & Sierra longtube headers in saying you will not find a better fitting, quality built, budget header for your vehicle.

Features include:

• Mandrel Bent Tubing
• Merge Spikes
• Race Version with "NO" Air & EGR Fittings
• Full 1 3/4" Primaries
• Longtube Header Design
• Silverado / Sierra / SUV LS Headers
• 3" Collector
• Gains over 25+ rwhp
• V8 Engines Only
• 4.8L, 5.3L, 6.0L Engines
• CNC Machined Flanges
• Natural Stainless Steel (Y-Pipe Natural Stainless Steel)
  
• Standard Graphite Manifold Gaskets

Vehicle Applications:

• 1999-2006 Chevrolet  SIlverado Truck & Tahoe SUV (2wd & 4wd)
  
• 1999-2006 GMC Sierra Truck &  Yukon SUV (2wd & 4wd)
  
• 2002-2006 Cadillac EXT Truck (2wd & 4wd)
  
• 2002-2006 Cadillac Escalade SUV (2wd & 4wd)
• 2002-2006 Chevrolet Avalanche (2wd & 4wd)

Note: If using a larger 4L80E transmission the bellhousing ears may need to be trimmed for proper clearance.

Note: Most 6.0 applications have a 2 into 1 exhaust system which our y pipe system will not work with. Double check your exhaust for confirmation of fitment with single exhaust. Our x pipe kit can work on the 2 into 1 exhaust systems, but require fabrication for connection.

Note: Earlier 2500's might have fitment issues due to chassis being designed from previous years. Earlier years have the upper control arms mounted on top of the chassis, which would cause fitment issues.

(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.