PPE 304 Stainless Steel Free-Flow Down Pipe – 2011–2015 Chevy/GMC Duramax LML

Part Number: 117000600
GTIN: 840171210323
OEM Reference: GM 12643610
CARB EO Number: D-701-30

Upgrade Your Duramax’s Breathing Power

The stock LML down pipe is one of the most restrictive parts of your exhaust system. It makes a sharp turn right off the turbo flange and even has dents in the piping that choke flow (seriously, who thought that was a good idea?). The result? Higher EGTs, sluggish turbo response, and lost horsepower.

The PPE Free-Flow Down Pipe fixes all that. Built from 3-inch 304 stainless steel, this high-flow design gives your turbo the path it deserves; smooth, unrestricted, and durable enough to outlast your truck. Plus, it comes wrapped in a woven titanium heat sleeve to keep under-hood temps down where they belong.

Key Features

• 304 Stainless Steel Construction – Built tough for long life and corrosion resistance.

• Lower EGTs & Better Turbo Response – Frees up horsepower your stock down pipe is holding back.

• TIG-Welded Flanges – Leak-free, precision-built connections that hold up to serious boost.

• Smooth, Free-Flowing Design – No dents, no restrictions, just clean flow.

• Titanium Heat Sleeve Included – Protects engine bay components and manages temps.

• Sensor-Friendly – Retains factory ports (2x M20-1.5 & 1x M14-1.5).

• Fits Factory or PPE Up-Pipes – A true drop-in upgrade.

Vehicle Compatibility

• 2011–2015 Chevy/GMC Duramax LML
  Note: Only fits models with a clamp-style connection to the exhaust pipe.

Added Value

• 3-Year Limited Warranty

• 30-Day Returns

• FREE Shipping on orders $100+

Why Upgrade to PPE’s Free-Flow Down Pipe?

If you’re after cooler EGTs, snappier turbo spool, and a stronger stainless steel design that won’t rust out like stock, this down pipe is a no-brainer. Whether you’re towing, daily driving, or chasing horsepower goals, PPE’s high-flow design unlocks performance your LML has been missing.