This Duramax oil cooler adapter kit is designed to fit 2001 - 2007 and 2011 - 2016 GM/Chevrolet 6.6L Duramax models. To use it, simply replace your old, problematic OEM oil cooler with this adapter kit. The slotted mounting holes make the installation process easy, even if you're not an expert. When installing, make sure to follow the instructions provided by clicking the link in the product description. As for maintenance, keep an eye on the square - cut gasket. Check it regularly for any signs of wear or damage. If you notice any issues, it's recommended to replace the gasket promptly to ensure the long - term leak - free performance of the oil cooler. Also, be aware of the temperature changes in your vehicle's operating environment, as extreme temperatures can affect the overall performance of the oil cooler.