Wehrli 11-16 Duramax LML Stainless 2in Up Pipe Kit w/ Gaskets

If you're working on your 2011-2016 LML Duramax Silverado or Sierra 2500/3500 HD, especially if it's used for heavy towing or performance upgrades, replacing the factory up-pipes is a smart move. The stock 1 5/8-inch pipes are known to be a weak point, prone to cracking and leaks, which can hurt performance and cause headaches down the road. This kit from Wehrli Custom Fabrication directly replaces those factory pipes with much more robust 2-inch units made from heavy-duty 11-gauge stainless steel.

These Wehrli up-pipes are built to last. They feature a 2-inch diameter for improved exhaust flow, which helps your turbo spool up faster and can lower Exhaust Gas Temperatures (EGTs). This is especially beneficial if you've upgraded your turbo or are running emissions-compliant tuning. The passenger side pipe includes a heavy-duty stainless steel bellows designed to prevent the cracking and leaks that plague the OEM parts. The kit also includes a ductile iron cast EGR connection with a port for an EGT sensor, and all the necessary gaskets for installation. It's designed as a direct bolt-on replacement, meaning no tuning is required, and it will work with your stock exhaust manifolds and downpipes, or with Wehrli's own billet exhaust manifold.

This kit is a solid upgrade for anyone looking to improve the reliability and performance of their LML Duramax truck. It's made in the USA and comes with all the gaskets you need to get the job done right. Just remember, this kit is not CARB approved and cannot be shipped to California.