2017-2022 Chevy GMC Downpipe Exhaust for 6.6L L5P Duramax Diesel 3.5
Brand New
Guaranteed Safe Checkout
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.
SHIPPING & DELIVERY
Fast Processing & Reliable Transit
- Processing: Orders are processed and shipped from the nearest warehouse within 24 hours.
- Delivery: Estimated delivery time is approximately 4 to 5 business days.
RETURNS & EXCHANGES
30-Day Hassle-Free Policy
- Return Window: We offer a 30-day return policy from the date of delivery.
- Process: To initiate a return or exchange, please contact our customer service team first to receive authorization and instructions.
WARRANTY
2-Year Limited Replacement Warranty
- Duration: All products are backed by a 2-year limited warranty.
- Coverage: This warranty covers manufacturing defects and product failures under normal use, and provides a replacement for qualified cases (repairs are not performed).
CUSTOMER SUPPORT
We’re Here to Help – Contact Us First
- Priority Contact: For any order-related issues—including returns, warranty claims, or general inquiries—please contact us first before taking further action. We are committed to resolving your concern promptly.
- Feedback Notice: If you are unsatisfied, we kindly ask that you allow us an opportunity to address the issue before leaving neutral or negative feedback.
- Email Support: You can reach us at support@SAMEXHAUST.com.
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.
