Dieselr 3-Inch Downpipe Duramax LML 6.6L (2011-2015)

3-Inch Downpipe for 2011-2015 6.6L Duramax LML

The Dieselr 3-Inch Downpipe Duramax LML 6.6L (2011-2015) is a direct-fit replacement engineered to improve exhaust transition directly off the turbocharger. Designed specifically for LML-equipped Silverado and Sierra HD trucks, this component replaces the restrictive factory downpipe while maintaining proper engine bay clearance.

Built around OE turbocharger position and firewall spacing, it supports consistent exhaust flow under load without requiring modification to surrounding components.

Platform Fitment

• 2011-2015 Chevrolet Silverado 2500HD 6.6L Duramax LML
• 2011-2015 Chevrolet Silverado 3500HD 6.6L Duramax LML
• 2011-2015 GMC Sierra 2500HD 6.6L Duramax LML
• 2011-2015 GMC Sierra 3500HD 6.6L Duramax LML

Confirm engine code and model year prior to ordering to ensure correct LML application.

Engineering Overview

Mandrel-Bent 3-Inch Construction

Constructed from 3-inch mandrel-bent tubing to reduce restriction compared to factory geometry while preserving correct routing.

Platform-Specific Design

Engineered to align with LML firewall clearance, transmission tunnel spacing, and factory turbo outlet location.

Direct Replacement Fitment

Installs in the OE downpipe location without requiring changes to stock mounting points.

Installation Notes

• Direct replacement for factory LML downpipe
• No tuning platform required for physical installation
• Installer is responsible for emissions compliance in their jurisdiction

Verify full exhaust configuration before purchase to ensure compatibility with the rest of your system.

Support

Dieselr validates and supports the platforms we carry. Confirm your exhaust strategy and proceed with confidence.

Built to work the way it should.