3.5" Downpipe Exhaust for 2017-2022 Chevy Silverado 2500HD/3500HD & GMC Sierra 2500HD/3500HD 6.6L L5P Duramax Diesel - High-Flow Turbo-Back Upgrade
Description
Upgrade your Duramax diesel with this high-performance 3.5" downpipe engineered for superior exhaust flow and efficiency. Crafted from high-quality stainless steel, this direct bolt-on upgrade maintains full emissions compliance while delivering improved performance without requiring any ECU tuning.
| Specification | Detail |
| Diameter | 3.5" for improved exhaust flow |
| Construction | High-quality stainless steel |
| Installation | Direct bolt-on (no tuning required) |
| Emissions | Maintains full compliance |
| Compatibility | Fits Silverado/Sierra 2500/3500HD |
| Installation | Professional installation recommended |
Fitment:
| Vehicle Model | Years | Engine |
|---|---|---|
| Chevy Silverado 2500HD | 2017-2022 | 6.6L L5P Duramax Diesel |
| Chevy Silverado 3500HD | 2017-2022 | 6.6L L5P Duramax Diesel |
| GMC Sierra 2500HD | 2017-2022 | 6.6L L5P Duramax Diesel |
| GMC Sierra 3500HD | 2017-2022 | 6.6L L5P Duramax Diesel |
Note：Not fit Cab & Chassis trucks.
Attention
Products on this site are for off-road/racing use only and are not legal for public roads where emissions laws apply.
Professional installation recommended. Removing emissions equipment (DPF, CAT, SCR, DOC) requires deleting related sensors and a compatible tuner to avoid engine codes.
Performance gains may vary—no guarantees.