Wehrli 04-05 Duramax (LLY) Passenger Side 3in Intercooler Pipe - Red

If you're working on your 2004-2005 Chevrolet Silverado 2500 HD with the LLY Duramax engine, this passenger side 3-inch intercooler pipe from Wehrli Custom Fabrication is a solid upgrade. It replaces the factory 2.5-inch pipe, which can be a weak point and lead to boost leaks, especially on trucks that work hard or see higher performance use. This pipe is designed to improve airflow between the turbo and the engine, which can lead to better throttle response and quicker turbo spool-up.

This pipe is made from 14-gauge aluminum and is mandrel-bent for smooth airflow, featuring a straight connection at the intercooler instead of the factory's angled boot. It uses upgraded silicone boots and stainless steel t-bolt clamps that are built to handle higher boost pressures than stock, helping to prevent blown boots and horsepower-robbing leaks. The red powder coat finish adds a nice touch under the hood. It's designed as a direct bolt-on replacement, meaning it fits with the stock Y-bridge and crossover pipe without needing any other modifications, upgrades, or tuning.

Installation is straightforward with basic hand tools. For the best results, Wehrli suggests pairing this pipe with emissions-compliant tuning and drop-in turbochargers.