MagnaFlow 17870 Stainless 5 inch DPF-Back Exhaust | 2007-2023 GM Silverado/Sierra 2500HD / 3500HD

Performance Benefits - Muffler Delete Design – Maximum airflow and most aggressive MagnaFlow tone in the DPF-back lineup - Free-Flowing 5” Stainless Tubing – Reduces backpressure for peak performance and exhaust velocity - Intercooled Polished 6” Tip – Delivers a clean, aggressive aesthetic with reduced tip temps - 409 Stainless Steel Construction – Rust-resistant, long-life tubing and components - Clamp-On System – No cutting or welding needed; installs with standard hand tools - Emissions Legal (DPF-Back) – Designed to retain factory emissions systems and maintain compliance Product Overview The MagnaFlow Pro Series 17870 is engineered for maximum power, sound, and airflow for 2007–2023 GM Duramax trucks. This DPF-back 5-inch system is tailor-made for drivers who want raw, unfiltered diesel sound and performance without crossing into emissions non-compliance. This system is muffler-free—replacing factory exhaust with mandrel-bent, 409 stainless steel tubing—delivering the highest possible flow rate while preserving DPF functionality. The system terminates in a 13-inch long, 6-inch diameter polished stainless steel tip with a rolled, angle-cut design and internal cooling fins. Whether you're running a tuned LMM, LML, LGH, or the latest L5P, this system provides an instant upgrade in throttle response, turbo spool, and audible presence—without drone inside the cab.