# Wehrli 2004.5-2005 LLY Duramax Passenger (Cold) Side 3in Intercooler Pipe- WCFab Grey The 3" High Flow Passenger Side Intercooler Pipe for 2004.5-2005 LLY Duramax replaces the 2.5" one piece pipe using an angled boot with a high flow, mandrel bent, 14 ga. aluminum one piece 3" pipe. This part uses upgraded silicone boots in order to withstand higher boost pressures than the factory components to increase reliability and eliminate blown factory boots and horsepower robbing boost leaks. Boot connection is straight at the intercooler unlike the angled factory boot connection. Finished in your choice of custom powder colors. This pipe is compatible with stock trucks requiring no additional modifications, upgrades, or tuning for installation. Improves airflow between the turbo and engine for improved efficiency, throttle response, and turbo spool up. Eliminates weak points in the factory design that can lead to boost leaks or complete failures in hard working and high performance applications. Installs easily with basic hand tools. Pairs best with emissions compliant tuning and drop in turbochargers for optimum performance gains. - OEM Clip Ring Design replaced by high quality silicone boot and stainless steel t-bolt clamps for improved sealing and ability to hold higher boost pressures without leaking - Will fit on stock truck no other modifications or upgrades necessary! - Compatible with OEM Y-Bridge/Cross Over Pipe - Durable Custom Powder Coat Finish - 3" Cold Side Intercooler Pipe - Flows 56% Better Than Stock! - NO Tuning required, bolt on! - Silicone Boots - T-Bolt Clamps - Made in USA This Part Fits: Year Make Model Submodel 2004-2005 Chevrolet Silverado 2500 HD Base 2005 Chevrolet Silverado 2500 HD LS 2005 Chevrolet Silverado 2500 HD LT 2004-2005 Chevrolet Silverado 3500 Base 2004-2005 Chevrolet Silverado 3500 LS 2004-2005 Chevrolet Silverado 3500 LT 2004 Chevrolet Silverado 3500 WT 2004-2005 GMC Sierra 2500 HD Base 2004-2005 GMC Sierra 2500 HD SLE 2004-2005 GMC Sierra 2500 HD SLT 2004-2005 GMC Sierra 2500 HD WT 2004-2005 GMC Sierra 3500 Base 2004-2005 GMC Sierra 3500 SLE 2004-2005 GMC Sierra 3500 SLT 2004-2005 GMC Sierra 3500 WT ## Details - **Price:** 477.11 CAD - **Vendor:** Wehrli - **Type:** Intercooler Pipe Kits ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 477.11 CAD | In stock | ## Images - Photo - Primary - User 1 - User 1 - User 2 - Logo Image --- > Source: [Standard Auto Part](https://www.standardautopart.com/products/wehrli-2004-5-2005-lly-duramax-passenger-cold-side-3in-intercooler-pipe-wcfab-grey) > Updated: 2026-07-07