Installation Time
(approx) 2 Hours
Difficulty Level:
Light to Moderate mechanical skill required.
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Stainless Works 1-7/8-Inch Catted Long Tube Headers; Performance Connect (20-24 6.6L Gas Sierra 2500 HD)
Item HG6621
Sierra 2500 Sales Techs:
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M-F 8:30A-11P, Sat-Sun 8:30A-9P
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Our Price
$2,409.20 (kit)
FREE Shipping Market Price $2,770.99 You Save 13% ($361.79) Up to 10% off for Military & First Responders! See DetailsWill this fit your Vehicle?
Ship to: Columbus - 43215
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Product Information
Features, Description, Reviews, Q&A, Specs & Installation
Features & Specs
- Get Increased Horsepower and Torque
- Emits an Impressive Exhaust Sound
- Features a Long Tube Header Design
- Free Flowing TIG-Welded Tubing
- Premium-Level 304 Stainless Steel Construction
- Calibration Required for Operation
- Fits All 2020-2024 6.6L Gas GMC Sierra 2500 HD Models
| Brand | Stainless Works |
| Headers Type | Long Tube Headers |
| Header Primary Size | 1.76-2.00 Inch |
| Header Collector Size | Stock Replacement |
| Header Finish | Polished |
Description
Upgraded Performance. Outperform the vehicles on the roads or tails with the performance that these Stainless Works Performance 1-7/8-Inch Catted Long Tube Headers are engineered to deliver. Their design promotes excellent exhaust flow, resulting in increased power, so you can drive with remarkable performance anywhere.
Impressive Racing Sound. The high-flow design of these Long Tube Headers delivers unrestricted exhaust flow. As such, they allow sound vibration to flow and exit the vehicle more freely, producing an intimidating sound that never fails to draw attention.
High-Performance Cats. These Long Tube Headers are equipped with high-flow catalytic converters. They are designed to perform better than your truck’s restrictive OE cats, giving you remarkable performance in high-intensity driving conditions.
Heavy-Duty Quality. These Long Tube Headers are designed for years of durability and reliable performance. They are made of heavy-duty 304 stainless steel with a rust-proof natural finish. They are precision-designed and TIG-welded to guarantee a perfect fit and lasting strength.
Calibration Required. Setting up these Long Tube Headers requires calibration to reprogram your Sierra 2500 HD truck’s ECU to guarantee optimized performance. This lets you take advantage of the full potential of these high-performance headers.
Application. These Stainless Works Performance Connect 1-7/8-Inch Catted Long Tube Headers is designed to fit all 2020-2024 6.6L Gas GMC Sierra 2500 HD models.
Fitment:
- 2020 GMC Sierra 2500
- 2021 GMC Sierra 2500
- 2022 GMC Sierra 2500
- 2023 GMC Sierra 2500
- 2024 GMC Sierra 2500
Stainless Works CT220HSTCAT
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Installation & What's in the Box
Installation Info
What's in the Box
- (2) Long Tube Headers
- (1) Primary Tube
- Installation Hardware
5.0
Customer Reviews (4)
Questions & Answers
10 More Questions
Will It Fit My Sierra 2500
- 6.6L V8 - 20, 21, 22, 23, 24
