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 one piece 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.. 3 in. High Flow Upper Intercooler Cross Over Pipe (18% Gain in Air Flow Over Stock). Wehrli Custom Fab High Flow Bundle Kit Stage 1, 11-16 Duramax LML, Illusion Purple. 3.5 in. Passenger (Cold) Side Intercooler Pipe (23% Gain in Air Flow Over Stock). Wehrli 11-16 Duramax LML High Flow Bundle Kit Stage 1 - Illusion Purple. Incorporated threaded bung to reinstall OEM Intake Temperature Sensor. High Flow Bundle Kit Stage 1, 11-16 Duramax LML, Illusion Purple. Includes Billet Turbo Resonator Plate for OEM Intake Horn. Connects to factory throttle valve and grid heater. 3 in. Driver (Hot) Side Intercooler Pipe. Hi Flo Kit Stage 1 11-16 Dmax Illus Pur. Compatible with OEM Y-Bridge. NO Tuning required, bolt on!. 14g aluminum construction. Hi Flo S1 11-16 IP. Intercooler Pipe. Made in USA

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