PPE 3" Stainless Down Pipe 01-04 GM 6.6L Duramax LB7

3" Stainless Downpipe (01–04 LB7 Duramax)

The factory downpipe on the 01–04 GM Duramax LB7 is restrictive and can hold your truck back—especially once tuning or performance upgrades are added. Replacing the stock downpipe improves exhaust flow and helps reduce backpressure, which can lead to better turbo response, lower EGTs, and improved throttle feel.

This 3" round downpipe replaces the factory downpipe with a smooth, free-flowing design to help your LB7 run cooler and perform better under load.

Built from 304 stainless steel and spiral heat wrapped with titanium woven thread, this downpipe is designed for long-term durability while also helping keep under-hood temperatures down.

Features

• Replaces restrictive 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

• 2001–2004 GM Duramax LB7

Important

You MUST select the correct version:

• Federal Emissions LB7

• California Emissions LB7