Wehrli 11-16 Duramax LML Stainless 2in Up Pipe Kit w/ Gaskets (Passenger Side)

If you're working on a 2011-2016 LML Duramax Silverado or Sierra 2500/3500 HD, this Wehrli Custom Fab passenger side up pipe kit is a solid upgrade over the stock component. The factory 1-5/8" pipe is known to be a weak point, prone to cracking and leaks, especially on trucks that work hard or tow heavy loads. This kit replaces that with a much more robust 2" diameter pipe made from 11-gauge stainless steel, featuring heavy-duty bellows designed to resist cracking.

Beyond just being stronger, this larger diameter pipe helps improve exhaust flow. You'll notice a quicker turbo spool-up and a reduction in Exhaust Gas Temperatures (EGTs), which is beneficial for both performance and engine longevity, especially when paired with larger turbos or emissions-compliant tuning. The kit comes complete with the necessary gaskets for installation, and it's designed as a bolt-on replacement that doesn't require any tuning or other modifications to fit with your OEM exhaust manifold and downpipe.

This kit is made in the USA and includes a ductile iron cast EGR connection with a port for an EGT sensor, offering a complete solution for replacing the factory passenger side up pipe.