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

Ditch the restrictive factory piping and give your L5P the airflow it deserves. This Flo-Pro 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.

Don't see your question? Ask us anything about this product.

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  Can I add a muffler to this exhaust system?

  You can! We recommend this option -> HERE.

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  Can this Exhaust be shipped to Dallas Texas in the USA?

  Unfortunately, these can't be shipped to the USA.

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  Hi - How do I delete the DEF/DPF in order to install this exhaust on my ‘18 LP5? Thanks

  You'll need to unlock your 2018 L5P's ECM first, and then you can apply custom delete tuning to the truck. After that you're free to install this delete pipe!