Upgrade your 2020–23 Chevy Silverado or GMC Sierra HD 2500/3500 with premium long tube headers from Stainless Works. Unleash that 6.6L gas 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 catalytic converters 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 2500/3500 6.6L gas motor in both 2WD and 4WD. It fits all cab and 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 and fully TIG welded for strength and durability at our state-of-the-art facility in Streetsboro, Ohio — engineered for long-term performance.
-
American-made from raw material to finished product
-
TIG welded by skilled craftsmen for strength and beauty
-
Lifetime warranty on material and craftsmanship
-
Direct bolt-on fit for 2020–23 Silverado/Sierra HD 6.6L
-
Available with Y-pipe or X-pipe configuration
| Vehicle Fitment | 2020–23 Chevy Silverado / GMC Sierra HD 2500/3500 6.6L Gas |
| System Type | Long Tube Header Kit |
| Primary Tube Size | 1-7/8" or 2" |
| Collector Size | 3" with Integrated Merge Spike |
| Catalytic Converters | EPA Compliant High-Flow |
| Connection Options | Stock Exhaust — or — Stainless Works Legend/Redline Catback |
| Transmission Compatibility | 6-Speed Transmission Only |
| Drivetrain | 2WD & 4WD |
| Cab/Bed Compatibility | All Cab & Bed Configurations |
| Material | 304 Stainless Steel |
| Welding | TIG Welded |
| Warranty | Lifetime |
| Origin | Made in USA — Streetsboro, Ohio |
⚠️ IMPORTANT FITMENT NOTE
This system only fits 6-speed transmission models. Please verify your transmission type before ordering.
This header system fits the 2020–23 Chevy Silverado / GMC Sierra HD 2500/3500 6.6L gas motor in the following configurations:
✓ 2020–23 Sierra HD 2500/3500 6.6L
✓ 2WD & 4WD Models
✓ All Cab & Bed Configurations
*Only fits 6-speed transmission
-
Driver & Passenger Side Headers x2
-
Catted Leads x2
-
Y-Pipe or X-Pipe
-
Band Clamps x4
-
Bolt Kit — 16 Pieces
-
RTV Tube
-
O2 Extensions x3
-
Donut Gasket
-
Bolts x2
-
Washers x4
-
Lock Washers x2
-
Nuts x2
-
Installation Instructions
Questions? Call us at 800-878-3635 | Mon–Fri 7:30am–4:30pm EST
Built To Order in 4 Weeks — Free Shipping on Orders $50+
