PPE 3" Stainless Down Pipe 04.5-10 6.6L LLY / LBZ / LMM Duramax

3" Stainless Downpipe (04.5–10 Duramax)

The factory downpipe on the 04.5–10 GM Duramax is known to be restrictive due to the crushed/oval section directly behind the turbo. That restriction limits exhaust flow and becomes even more noticeable once tuning or other performance upgrades are added—often leading to higher EGTs and slower throttle response.

This 3" round downpipe replaces the crushed factory pipe with a smooth, free-flowing design to help your truck breathe better, spool quicker, and run cooler under load.

Built from 304 stainless steel and spiral heat wrapped with titanium woven thread, this downpipe is made to handle real heat and real abuse while also helping reduce under-hood temperatures.

Features

• Replaces restrictive crushed/oval factory downpipe

• 3" smooth round design for improved exhaust flow

• Helps reduce backpressure, improve throttle response, and help control EGTs

• 304 stainless steel construction for long-term durability

• Spiral heat wrap included (titanium woven thread)

• Includes stainless clamps to secure heat wrap

Fitment

• 2004.5–2010 GM Duramax Diesel