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SuperMaxx 1999-06 Chevy/GMC 1500/ Hummer H2 Long Tube Headers Only
SuperMaxx 1999-06 Chevy/GMC 1500/ Hummer H2 Long Tube Headers Only

SuperMaxx 1999-06 Chevy/GMC 1500/ Hummer H2 Long Tube Headers Only

Chevy LS V8, Long Tube Header Tube Type, Natural, Round Port Flange Style, Stainless Steel

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SuperMaxx 1999-06 Chevy/GMC 1500/ Hummer H2 Long Tube Headers Only
SuperMaxx 1999-06 Chevy/GMC 1500/ Hummer H2 Long Tube Headers Only
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Part # 31171584110
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  • Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.


Header Tube Type:
Long Tube
Flange Style:
Round Port
Primary Tube Diameter:
Material Type:
Stainless Steel
MFG. Part #:
Collector Diameter:
2-1/2 Inch
Collector Length:
Flange Thickness:
Hardware Included:
Gasket(s) Included:
Sold in Quantity:


Bolt-on an additional 17 HP** over the factory exhaust system! Dynatech® SuperMaxx stainless steel exhaust systems are engineered to give your Chevy Silverado/GMC Sierra 1500 or Hummer H2 V8 maximum performance both on and off road. These full length headers are designed to be a direct replacement fit for restrictive factory exhaust and catalytic converter systems, these systems are a great way to get that extra power you are looking for.

  • Primary Tube Size: 1-3/4"
  • Collector Size: 2-1/2"
  • System Tube Size: 2-1/2"
  • Material: T-304 Stainless Steel
  • OBD II Compliant: Yes
  • Hardware Included: Gaskets, Bolts, O2 Extensions
  • Fit: Direct Bolt-Up to any factory or aftermarket cat back

For ceramic coating, add Dynatech® Ceramic Coating part number 31179000100to your cart. 

**Dyno tested using a factory cat-back/muffler in a 5.3L application. 

4.8L & 5.3L Instructions (PDF)

6.0L Instructions (PDF)

Item Details

1999-06 GM 1500 4.8L, 5.3L & 6.0L 2WD & 4WD
1999-06 Hummer H2


  1. Intermediate pipes come with Square O2 extension cables. Some trucks came equipped with Trapezoidal shaped O2 extension cables. If you have Trapezoidal shaped extensions, you will also need to order extension cable 311-88635300F (listed).
  2. These products are intended for racing and off-road applications. Not legal for sale or use in the state of California, nor in states which have adopted California emissions standards.


  • 3/8" laser-cut and machine-ground flanges for a long-lasting, tight seal
  • Computer-designed collectors for maximum air flow
  • True bolt-in — no cutting or welding
  • "OEM-style" triple-layer stainless steel gaskets included for long-term, leak-free service
Some parts are not legal for use in California or other states with similar laws/regulations

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  • Maintaining your headers is an important part of any hot rod. Pat gives some tips and demonstrates how well Purple Metal Polish works for keeping your headers looking great.
  • Wouldn't it be nice to get the best of both worlds out of your headers? Speedway Motors has solved that problem with our exclusive heat resistant Armor Hot Coating. Now you can keep that great look with longer life.
  • Pat shows that exhaust can make a difference on even your daily driver. Check out this video of Pat with the Hooker Muffler installed on his '03 Suburban.
  • Our Tru-Ram Exhaust Manifolds are one of our most popular items. Tim provides more details about them and gives you a great look at them.

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