This is a used 2017-2023 Chevy/GMC L5P Duramax Turbo Diesel EGR Cooler, specifically designed for 6.6L engines. It is an OEM part manufactured by General Motors with the part number 12688224. This electric-driven EGR cooler is made of alloy steel and features sealed construction, no drilling required, and 100% accuracy of fit. It is designed for front placement on the vehicle with 4 mount holes and a single vacuum port. With a manufacturer warranty of 1 month, this EGR cooler is a reliable and high-quality performance part for Chevy/GMC trucks. Any questions please ask. Thanks!