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 |
| Part Number | 60706 |
| 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 |
Shipping: In-stock orders placed before 3 PM EST ship the same day, and everything else ships within 24 hours. Standard, expedited, and overnight options are available at checkout. Backordered items ship as soon as we get them back in stock. Contact us for lead times. See the full Shipping Policy.
Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
