Wehrli Model WCF100409

Stage 1 upgrade for the 2011-2016 LML Duramax 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.

The 3" High Flow Passenger Side Upper Crossover Intercooler Pipe provides a 20% increase in size over the OEM part. Eliminates resonator for improved appearance and more aggressive turbo and engine sound. For use with the OEM Y-Bridge and connects to the factory throttle valve and grid heater.

The 3" High Flow Driver Side Intercooler Pipe replaces the factory two-piece 2.5” pipe with a high flow 3" pipe.

The 3.5" High Flow Passenger Side Intercooler Pipe replaces the factory plastic two-piece pipe with a high flow, 14 ga. aluminum one-piece 3.5" pipe.

Includes upgraded silicone boots to withstand higher boost pressures than the factory components to increase reliability and eliminate blown factory boots and horsepower-robbing boost leaks.

Finished in your choice of custom powder colors. Pairs best with emissions-compliant tuning and drop-in turbochargers for optimum performance gains.