Wehrli 100704 3 inch Stainless Turbo Downpipe | 2011-2015 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Features: - Fits 2011–2015 6.6L Duramax LML engines - Replaces restrictive factory downpipe - Full 3-inch stainless steel construction - Compatible with v-band style turbo connections - Not compatible with 3-bolt flange turbos - Includes heat wrap and clamps for installation - Improves exhaust flow and turbo response - Reduces backpressure for better performance - Designed for factory or drop-in style turbos - Durable and corrosion-resistant stainless material - Direct bolt-on fit for easy installation - Made for Silverado and Sierra HD trucks Let Your Duramax Breathe With A Real Upgrade If you’re looking to ditch the crushed, restrictive factory downpipe and unlock real airflow from your turbo, the Wehrli 3-Inch Stainless Turbo Downpipe is the upgrade your LML Duramax has been waiting for. Built specifically for 2011–2015 Silverado and Sierra 2500HD/3500HD trucks, this downpipe delivers smoother exhaust flow and better turbo response from the moment you hit the throttle. The full 3-inch diameter and high-quality stainless steel construction mean you’re not only improving performance, you’re also adding long-term durability to your setup. Whether you’re towing, daily driving, or building for more boost, this bolt-on replacement eliminates a major bottleneck in your exhaust system. It comes with heat wrap and clamps included, so you’ve got everything needed for a clean and efficient install. Designed to work with factory turbos or drop-in replacements using a v-band flange, this pipe lets your setup breathe like it should. If you want a quick win in performance and drivability, this downpipe makes it easy to feel the difference. Built To Eliminate Restrictions And Maximize Flow The Wehrli 100704 3-Inch Stainless Turbo Downpipe is a precision-fit upgrade for 2011–2015 GM 6.6L Duramax LML engines using a v-band style turbo connection. Unlike the stock crushed downpipe, this full 3-inch mandrel-bent stainless steel pipe ensures smooth, unrestricted exhaust flow from the turbo outlet. This results in reduced backpressure, improved turbo spool-up, and lower exhaust gas temperatures, key performance benefits for both tuned and stock applications. The downpipe is designed as a direct bolt-on replacement for trucks running the factory or drop-in style turbos with a v-band flange. It includes high-temp heat wrap and quality clamps to protect surrounding components and maintain a clean engine bay. This kit is not compatible with 3-bolt flange turbos and should only be used with v-band setups. Ideal for performance-minded daily drivers and workhorse builds alike, the Wehrli downpipe offers a simple, effective upgrade that supports improved efficiency and long-term reliability. Fits: 2011, 2012, 2013, 2014, 2015 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML Notes: - Fits 2011–2015 GM Silverado/Sierra 2500HD and 3500HD with 6.6L LML Duramax - Designed for use with factory or drop-in style turbos using a v-band connection - Not compatible with 3-bolt flange turbo configurations - Replaces the restrictive crushed factory downpipe - Constructed from high-quality 3-inch stainless steel tubing - Improves exhaust flow and reduces turbo backpressure - Helps lower EGTs and improve throttle response - Kit includes heat wrap and clamps for installation - Direct bolt-on installation with no major modifications required - Recommended for performance upgrades and improved drivability