Wehrli 15.5-16 Chevrolet 6.6L LML Duramax 3in Stainless Down Pipe (3 Bolt Flange)

If you're looking to get more out of your 2015.5-2016 LML Duramax, swapping out the factory down pipe is a smart move. That stock pipe can get pretty crushed from the factory, choking off exhaust flow. This Wehrli down pipe is a full 3 inches of stainless steel, designed to bolt right up to your factory turbo or a factory-style replacement, and it uses the 3-bolt flange connection found on these specific trucks.

Wehrli builds these from stainless steel, which is a solid choice for resisting corrosion, especially with exhaust components. It's designed to be a direct replacement for GM part numbers 12674630 and 12655717, so you know it's meant to fit. The kit even includes heat wrap and clamps to help with installation and keep things tidy. Best of all, you don't need to retune your truck for this part to work; it's designed to improve flow without requiring any changes to your computer.

Just a heads-up, this down pipe is not CARB approved and cannot be shipped to California. If you have a 2011-2014 model with a V-band connection, you'll need a different part number.