I removed the finned derby cover Saturday morning and set it on a glass top table to see if it was warped , it did rock a little . After closer inspection I could see that every bolt hole was pulled out a little in the back . I took it back to the dealer and showed him what it looked like and also showed him exactly where the oil was seaping past the pan cake gasket . He took it back and showed one of the techs and came back and told me to grab another new one . The tech said NOT to torque the screws on these , I had torqued them to 95 in. lbs., he said just snug them up good which I did and no leak . The collection ones are no where near as thick through the holes as the stock covers so I can see by torqueing them as per the instructions can cause this . The only thing I'm going to do is check the screws every so often to make sure they are staying tight .I really didn't want to use gasket sealer or 2 gaskets and it looks like I won't have to .