Wehrli 11-16 Duramax LML Passenger Side 3.5 in. Intercooler Pipe - Gloss Black

If you're working on your 2011-2016 Duramax LML Silverado or Sierra, this passenger side intercooler pipe from Wehrli is a solid upgrade over the stock plastic. The factory pipe is a known weak point, prone to blowing apart under higher boost pressures, leading to frustrating boost leaks and reduced engine performance. This one-piece, 3.5-inch aluminum pipe is built to handle more, helping to ensure reliable airflow between your turbo and the engine.

This pipe is constructed from 14-gauge aluminum for strength and durability, and it's finished in a gloss black powder coat to look good under the hood. It uses high-quality silicone boots and stainless steel t-bolt clamps, which create a much more secure seal than the factory clip rings and are designed to withstand higher boost pressures. This means you're less likely to experience those horsepower-robbing leaks. It also includes a threaded bung to easily reinstall your OEM intake temperature sensor, and it's designed to fit with your stock Y-bridge without needing any other modifications or tuning.

Installing this pipe is a straightforward job with basic hand tools, and it's designed as a direct bolt-on replacement. While it works great on a stock truck, it's also a good choice if you plan on adding emissions-compliant tuning or a drop-in turbocharger down the road, as it will support those upgrades with improved airflow. This pipe replaces GM part numbers 22737494, 20930188, 23421455, and 84094727.