Kooks 1 3/4" Header w/Ultra-Green Catted Connection 2019-2021 Silverado & GMC Sierra 1500 5.3L

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Our Price: $4,196.74
Frequently bought together:


  • Tube Diameter: 1.625 Inch
  • Header Type: Long Tube
  • Header Material: T304 Stainless
  • Header Finish: Natural
  • Gaskets Included: Yes 
  • Catalytic Converter: Yes 
  • Catalytic Converter Type: Green Cat 
  • Tune Required: Yes
  • 3" Merge Collector
  • 3/8" Thick Laser Cut Flanges

The Kooks 1 3/4" long tube design is built to provide more horsepower and torque through the RPM power band. The 18 gauge stainless finish will add an instant bolt on appearance of your underhood with its natural stainless finish.

NOT CARB legal. 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.

Emissions Disclaimer: NOT CARB legal and CANNOT ship to California.

Warranty (opens in new tab): Click HERE

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Warranty Information

Warranty Information (opens in new tab): Click HERE

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