PPE 2017-2026 GM 6.6L Duramax High Flow Exhaust Manifolds with Up-Pipes

Free up your exhaust on your GM 6.6L Duramax with the PPE High-Flow Exhaust Manifold & Up-Pipe Kit. Built to significantly cut exhaust back-pressure, this manifold-and-up-pipe system lowers EGTs, accelerates turbo spool-up, and improves turbo efficiency and fuel economy — all while maintaining reliability.

Why Choose the PPE High-Flow Manifold & Up-Pipe Kit?

• Lower Back-Pressure – Significant reduction in exhaust back-pressure for better flow.
• Lower EGTs & Faster Spool – Drops exhaust gas temperatures, speeds turbo spool-up, and improves turbo efficiency and fuel economy.
• Sil-Moly Cast Iron Manifold – High-sil moly cast iron construction built for high-heat durability.
• Free-Flow 304 Stainless Up-Pipes – Two-inch up-pipes with internally sleeved bellows in aircraft-grade 304 stainless, with increased inner diameter for higher flow.
• Factory Heat Shield Compatible – Up-pipes work with your factory heat shields.
• Complete Hardware Package – Includes high-temp coated exhaust manifold gaskets, upper and lower up-pipe gaskets, and manifold bolts, studs, and spacers.
• 3-Year Limited Warranty – Backed by PPE.

Kit Includes

• PPE High-Flow sil-moly cast iron exhaust manifold
• Two-inch 304 stainless up-pipes with sleeved bellows
• Exhaust manifold gaskets with high-temp coating
• Upper and lower up-pipe gaskets
• Manifold bolts, studs, and spacers

Specifications

• Part number: 116112500
• GTIN: 840171209082
• Reference: D-701-36
• Manifold material: high-sil moly cast iron
• Up-pipe material: aircraft-grade 304 stainless steel
• Up-pipe diameter: 2" (increased inner diameter, internally sleeved bellows)

Key Features at a Glance

• Sil-Moly Cast Manifold - High-heat durability.
• 2" 304 Stainless Up-Pipes - Higher flow, sleeved bellows.
• Lower EGTs, Faster Spool - More efficient turbo.
• Complete Hardware Included - Gaskets, bolts, studs, spacers.
• 3-Year Warranty - PPE-backed.

Notes

• Ceramic coating option: an optional ceramic coating is available for the High-Flow manifold. It creates a thermal barrier that resists heat absorption to further reduce surface temperature and EGTs, and adds long-lasting protection against moisture, road salts, oil, fuel, and other corrosives. Confirm the correct part number for the ceramic-coated configuration.
• Complete the upgrade with a PPE 3-inch 304 stainless steel down pipe (sold separately).

SKU: 116112500

Questions? We're Here to Help.

Have questions about upgrades for your Duramax? Contact FASS Motorsports and we'll get you dialed:

Phone: 636-429-7020

Email: info@fassmotorsports.com