Upgrade to Long Tube headers on your 2020-21 Chevy Silverado or GMC Sierra HD with this system from Stainless Works. Unleash that 6.6L motor with 2" primaries that flow into a 3" collector with an integrated merge spike. This system comes with high flow cats and an X-pipe for a simple bolt-on install.
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2020-2022 | Chevrolet | Silverado 2500 HD | Custom |
| 2020-2022 | Chevrolet | Silverado 2500 HD | High Country |
| 2020-2022 | Chevrolet | Silverado 2500 HD | LT |
| 2020-2022 | Chevrolet | Silverado 2500 HD | LTZ |
| 2020-2022 | Chevrolet | Silverado 2500 HD | WT |
| 2020-2022 | Chevrolet | Silverado 3500 HD | High Country |
| 2020-2022 | Chevrolet | Silverado 3500 HD | LT |
| 2020-2022 | Chevrolet | Silverado 3500 HD | LTZ |
| 2020-2022 | Chevrolet | Silverado 3500 HD | WT |
| 2020-2022 | GMC | Sierra 2500 HD | AT4 |
| 2020-2021 | GMC | Sierra 2500 HD | Base |
| 2020-2022 | GMC | Sierra 2500 HD | Denali |
| 2022 | GMC | Sierra 2500 HD | Pro |
| 2020-2022 | GMC | Sierra 2500 HD | SLE |
| 2020-2022 | GMC | Sierra 2500 HD | SLT |
| 2020-2022 | GMC | Sierra 3500 HD | AT4 |
| 2020-2021 | GMC | Sierra 3500 HD | Base |
| 2020-2022 | GMC | Sierra 3500 HD | Denali |
| 2022 | GMC | Sierra 3500 HD | Pro |
| 2020-2022 | GMC | Sierra 3500 HD | SLE |
| 2020-2022 | GMC | Sierra 3500 HD | SLT |
- 2020-chevrolet-silverado-2500-hd-custom-esi7141870
- 2020-chevrolet-silverado-2500-hd-high-country-esi2759365
- 2020-chevrolet-silverado-2500-hd-lt-esi3044512
- 2020-chevrolet-silverado-2500-hd-ltz-esi8939551
- 2020-chevrolet-silverado-3500-hd-high-country-esi6291163
- 2020-chevrolet-silverado-3500-hd-lt-esi7639727
- 2020-gmc-sierra-2500-hd-at4-esi1491754
- 2020-gmc-sierra-2500-hd-base-esi4937909
- 2020-gmc-sierra-2500-hd-denali-esi3996562
- 2020-gmc-sierra-2500-hd-slt-esi2768919
- 2020-gmc-sierra-3500-hd-at4-esi1573497
- 2020-gmc-sierra-3500-hd-base-esi5136933
- 2020-gmc-sierra-3500-hd-denali-esi2528551
- 2021-chevrolet-silverado-2500-hd-custom-esi9879206
- 2021-chevrolet-silverado-2500-hd-high-country-esi5045135
- 2021-chevrolet-silverado-2500-hd-lt-esi6168057
- 2021-chevrolet-silverado-2500-hd-wt-esi5347913
- 2021-chevrolet-silverado-3500-hd-high-country-esi6458092
- 2021-chevrolet-silverado-3500-hd-lt-esi3245409
- 2021-gmc-sierra-2500-hd-at4-esi7943559
- 2021-gmc-sierra-2500-hd-base-esi7503648
- 2021-gmc-sierra-2500-hd-denali-esi1221986
- 2021-gmc-sierra-2500-hd-slt-esi9004128
- 2021-gmc-sierra-3500-hd-at4-esi3268059
- 2021-gmc-sierra-3500-hd-base-esi6337613
- 2021-gmc-sierra-3500-hd-denali-esi6410654
- 2022-chevrolet-silverado-2500-hd-custom-esi5303805
- 2022-chevrolet-silverado-2500-hd-high-country-esi7242354
- 2022-chevrolet-silverado-2500-hd-lt-esi2136628
- 2022-chevrolet-silverado-3500-hd-high-country-esi5171538
- 2022-chevrolet-silverado-3500-hd-lt-esi1489700
- 2022-gmc-sierra-2500-hd-at4-esi1005364
- 2022-gmc-sierra-2500-hd-denali-esi6598946
- 2022-gmc-sierra-2500-hd-pro-esi3222701
- 2022-gmc-sierra-2500-hd-sle-esi3666358
- 2022-gmc-sierra-2500-hd-slt-esi4166084
- 2022-gmc-sierra-3500-hd-at4-esi7400879
- 2022-gmc-sierra-3500-hd-denali-esi7719026
- 2022-gmc-sierra-3500-hd-pro-esi4837003
- 2022-gmc-sierra-3500-hd-sle-esi8493590
- ClearanceItem:N
- EPA:Testing
- fits_2020-2022`Chevrolet`Silverado 2500 HD`Custom~2020-2022`Chevrolet`Silverado 2500 HD`High Country~2020-2022`Chevrolet`Silverado 2500 HD`LT~2020-2022`Chevrolet`Silverado 2500 HD`LTZ~2020-2022`Chevrolet`Silverado 2500 HD`WT
- fits_2020-2022`Chevrolet`Silverado 3500 HD`High Country~2020-2022`Chevrolet`Silverado 3500 HD`LT~2020-2022`Chevrolet`Silverado 3500 HD`LTZ~2020-2022`Chevrolet`Silverado 3500 HD`WT~2020-2022`GMC`Sierra 2500 HD`AT4~2020-2021`GMC`Sierra 2500 HD`Base
- fits_2020-2022`GMC`Sierra 2500 HD`Denali~2022`GMC`Sierra 2500 HD`Pro~2020-2022`GMC`Sierra 2500 HD`SLE~2020-2022`GMC`Sierra 2500 HD`SLT~2020-2022`GMC`Sierra 3500 HD`AT4~2020-2021`GMC`Sierra 3500 HD`Base~2020-2022`GMC`Sierra 3500 HD`Denali
- fits_2022`GMC`Sierra 3500 HD`Pro~2020-2022`GMC`Sierra 3500 HD`SLE~2020-2022`GMC`Sierra 3500 HD`SLT
- LTL:N
- MPN:CT220HCAT
- Non-CARB:Y
- Prop65:Y
- SpecialOrder:Y