2020 Silverado HD 6.6L Gas long tube header on white background.

2020-23 Silverado HD 6.6L Long Tube Header Kit

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Built To Order in 4 Weeks
This product is not legal for street use on an emissions-controlled vehicle. It may be used on dedicated competition or pre-pollution controlled vehicles only.

Upgrade to Long Tube headers on your 2020-23 Chevy Silverado or GMC Sierra HD with this system from Stainless Works. Unleash that 6.6L motor with 1-7/8" or 2" primaries that flow into a 3" collector with an integrated merge spike. This system comes with high flow cats and your choice of either a Y-Pipe or X-pipe for a simple bolt-on install.

Out of the box this system fits the 6.6L gas motor in both 2 wheel and 4 wheel drive. It fits all cab/bed configurations and can connect to the stock exhaust or Stainless Works Legend or Redline catback systems for a True Dual Exhaust.

Built from corrosion resistant 304 stainless steel, our headers are TIG welded for strength and durability at our state-of-the-art facility in Streetsboro, Ohio. We stand by our products with a lifetime warranty on materials and craftsmanship, and as always, our products are proudly made in the USA.


  • Fits 2020-23 Silverado HD 6.6L Gas Motor
  • 1-⅞” or 2” Primaries
  • Y-Pipe Or X-Pipe
  • High Flow Cats

Installation Instructions .pdf (3mb)

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Made in the USA

Stainless Works products are made proudly in Cleveland, Ohio

Long Tube Headers

For use on Race & Competition Vehicles Only.