MUST BE FACTORY CAT OIL PAN, NO AFTERMARKET. THE QUALITY ISN'T THE SAME AND DOES NOT WELD UP PROPERLY. C15 Acert oil pan with front drain plug shaved and leak checked. 1" filler made, fully tig welded inside and out. Outside we metal finish. Will need to be re painted before install. We charge a $1,200 refundable core charge. You have 30 days to return the core unless prior arrangements are made. If it's not a usable core or you don't have a core we will provide one. We recommend changing pan gasket and isolators to prevent leaks after install