6.6L Duramax Downpipe-Back Race Exhaust for 2011-2015 Silverado/Sierra HD - Fits 2500/3500 Models | Mandrel-Bent Construction
Bundle Discounts
Discounts auto-apply at checkout
- 3 items → Extra 5% off
- 5 items → Extra 7% off
- 7 items → Extra 9% off
$694.09
Description
Maximize your Duramax's performance with this competition-ready stainless steel exhaust system. Features 5" mandrel-bent stainless steel high-flow design that reduces backpressure and eliminates restrictive factory DPF & CAT emissions components. Improves turbo response, lowers EGTs during heavy towing, and delivers an aggressive diesel sound with straight-through design.
| Specification | Detail |
| Construction | 5" Mandrel-Bent Stainless Steel |
| System Type | Downpipe-Back Exhaust System |
| Installation | Direct bolt-on fitment with OE-style hangers |
| Emissions | DPF & CAT delete - eliminates restrictive factory components |
| Performance Benefits | Reduces backpressure, lowers EGTs, improves turbo response |
| Sound | Aggressive diesel sound with straight-through design |
| Requirements | Requires ECU tuning. For off-road/racing use only. |
Fitment:
| Vehicle Model | Years | Engine |
|---|---|---|
| Chevrolet Silverado 2500HD/3500HD | 2011-2015 | 6.6L Duramax LML |
| GMC Sierra 2500HD/3500HD | 2011-2015 | 6.6L Duramax LML |
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.
