Upgrade your 2006-2007 Chevrolet GMC GM Silverado Serra 2500 3500 with the 6.6L LBZ Duramax Diesel EGR Delete Valve Cooler Kit & Intake Elbow Tube Kit. This kit is designed to improve engine performance by removing the restrictive EGR system and replacing it with a high-flow intake elbow. The EGR delete valve cooler kit helps to reduce exhaust gas recirculation, resulting in lower engine temperatures and improved overall engine efficiency. The intake elbow tube kit allows for increased airflow, which can lead to better throttle response and increased horsepower. Make the most out of your 6.6L LBZ Duramax engine with this essential upgrade.