3.5" 2017+ Chevy/GMC Duramax L5P exhaust-side bolt on flange for custom downpipes

Ready to build a custom downpipe for your L5P Duramax? The Blue Fire Motorsports 3.5" Mild Steel Bolt-On Exhaust Flange is specifically designed for the exhaust side of your new downpipe.

Built for '17 and later GMC/Chevy Duramax L5P and constructed from mild steel, this flange is built to withstand high heat and pressure while providing a secure, bolt-on connection to your exhaust. No need for adapters or custom solutions—this flange is ready to go right out of the box, helping you create a high-performance down-pipe setup with ease.

Upgrade your exhaust system with confidence and precision. Start your custom build today!

Pair with our turbo-side V-Band flange and add your own 3.5" pipe!

Contact us directly to talk about bulk order discounts.