This Borla 3.5in extension pipe adapts Borla 147.4in wheelbase cat-back systems to Crew Cab Standard Bed (6' 7") 157in wheelbase Silverado/Sierra 1500 trucks. Excludes ZR2 and AT4X models. T-304 stainless steel; includes one 3in clamp.
| Type | Cat-back extension / wheelbase adapter pipe |
| Material | T-304 stainless steel |
| Dimensions | 3.5in I.D. inlet, 3.5in O.D. outlet, 12in long |
| Application | Crew Cab Standard Bed (6' 7') 157in WB; excludes ZR2 and AT4X |
| Includes | One 3.5in clamp |
| Warranty | Borla Million-Mile Warranty |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2020-2021 | Chevrolet | Silverado 1500 | Custom Trail Boss |
| 2019-2023 | Chevrolet | Silverado 1500 | High Country |
| 2020-2023 | Chevrolet | Silverado 1500 | LT Trail Boss |
| 2019-2023 | Chevrolet | Silverado 1500 | LTZ |
| 2020-2023 | Chevrolet | Silverado 1500 | RST |
| 2019,2022-2023 | GMC | Sierra 1500 | AT4 |
| 2019-2023 | GMC | Sierra 1500 | Denali |
| 2019-2023 | GMC | Sierra 1500 | SLT |
