Speed Engineering Silverado & Sierra 1 7/8" Longtube Headers | 1999-2006
Speed Engineering Silverado & Sierra 1 7/8" Longtube Headers | 1999-2006
Speed Engineering Silverado & Sierra 1 7/8" Longtube Headers | 1999-2006
Speed Engineering Silverado & Sierra 1 7/8" Longtube Headers | 1999-2006
Speed Engineering Silverado & Sierra 1 7/8" Longtube Headers | 1999-2006
Speed Engineering Silverado & Sierra 1 7/8" Longtube Headers | 1999-2006
304 Stainless Merge Spike
Speed Engineering Spark Plug Wires
Speed Engineering Silverado & Sierra 1 7/8" Longtube Headers | 1999-2006
Speed Engineering Silverado & Sierra 1 7/8" Longtube Headers | 1999-2006
Speed Engineering Silverado & Sierra 1 7/8" Longtube Headers | 1999-2006
Speed Engineering Silverado & Sierra 1 7/8" Longtube Headers | 1999-2006
Speed Engineering Silverado & Sierra 1 7/8" Longtube Headers | 1999-2006

Speed Engineering Silverado & Sierra 1 7/8" Longtube Headers 1999-2006

Regular price $319.99 Save $-319.99
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SKU: 25-1011

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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
  • Race Version with "NO" Air & EGR Fittings
  • Full 1 7/8" Primaries
  • 3" Collector
  • Longtube Header Design
  • Silverado / Sierra / SUV LS Headers
  • Gains over 25+ rwhp
  • V8 Engines Only
  • 4.8L, 5.3L, 6.0L Engines
  • CNC Machined Flanges
  • Natural 304 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: 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.

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.

(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.

 

Customer Reviews

Based on 17 reviews
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L
Luis

2nd time buying these headers for one of my trucks and they never disappoint 10/10 purchase

D
Daniel

Give a perfect time between deep and loud, very easy to put on and lined up perfectly!

L
Landon

Love how easy and fast it was can’t wait to install them… today:)

J
JL

Arrived in perfect condition. Was missing one of the header bolts but I have extras so no problem. They're off getting coated so haven't installed them yet but ready too.

M
Matt de Puglia
My 2004 3/4 ton 6.0L

Purchased these for my 2004 crew cab shorted 3/4 ton 6.0L. Watched many reviews and installs online and did my homework. Opening the box and getting hands on em I was very satisfied with the craftsmanship of all the welds. I checked the collector area with a flashlight just to double check for leaks or pin holes and found none. I also purchased the hardwarekit, gasket kit, wires and boots. For installation you do need to or it is recommended to cut the one ear tab off the passenger side of the stransmission. This does no harm to the Trans or mess with performance. The headers sound amazing with the system I went with and they just look killer once you get a few heat cycles on them. My system configuration is the long tube header to 3" pipe off each collector back to 2 side by side stacked 40 series 2 chamber flowmasters out to two 4" stainless tips stacked up tight on the passenger side dumped just over the rear axle . true duals, no cats rear 02 censor deleted and ecm tuned and for fun a mild idle chop setting. Truck sounds absolutely ridiculously amazing just how it should. Turns heads wherever you go. Super pleased with the product and if anybody ever ask whats under my hood I'll send em your way. Thanks again super happy with the product and outcome.