2017-2019 Duramax 5" Downpipe-Back Dual Exhaust (531015)

Fits

Ditch the restrictive factory piping and give your L5P the airflow it deserves. This Mel’s Manufacturing 5-inch downpipe-back dual exhaust system is built in Alberta, Canada, using premium 16-gauge U.S. steel. Unlike "scanned" imitations, every bend and hanger is engineered by real tradespeople to ensure a perfect fit and maximum performance under load.

By moving to a massive 5-inch dual-exit configuration, you’ll see a significant reduction in Exhaust Gas Temperatures (EGTs) and improved turbo spool-up. Whether you choose the rugged aluminized steel or the corrosion-resistant stainless option, you’re getting a system designed for North American standards and the horsepower to prove it.

Part Number: 531015

• North American Steel: Formed from U.S.-sourced 16-gauge steel for superior longevity over offshore substitutes.
• Precision Engineering: Pre-welded contour bends and Canadian-fabricated hangers ensure a painless, OE-level fitment.
• Performance Gains: High-flow design lowers EGTs and improves overall engine efficiency and throttle response.
• Superior Build: Features stronger flanges and cleaner welds than mass-produced "scanned" clones.
• Signature Sound: Delivers a deep, aggressive dual-exhaust note that lets your Duramax be heard.

• (1) 5" Downpipe-Back Dual Exhaust Kit
• (1) Set of Heavy-Duty Clamps and Hangers

• Installation: Designed as a direct fit for 2017-2019 L5P models; check local emissions regulations before installation.
• Finish: Available in 16-gauge Aluminized or Stainless Steel.