Have just purchased, received, and installed the TSP 81074 oil pan that this thread was started about. An earlier comment questioned if it is made in the U.S.. It is not. It is actually (no surprise) made in China. I purchased from an Ebay seller, performancepartsracing in Lenexa, Kansas, for $243.45. This price included shipping and tax (which is now, as everyone knows collected by Ebay). It came FedEx and was here in 2 days. Anyone who has researched this pan will find it comes with oil pick up tube, tube o-ring, oil cooler block off plate, pan baffle, a new gasket, drain plug, and new fasteners. Upon installing the pan on my 6.0 vortec I found the end of the pick up tube that the o-ring slides onto was poorly formed. I looks like when they pressed the metal stop ring onto the end of the tube, it sort of scarred up the tube and distorted the tube slightly out of round. Installed the new o-ring provided and test fitted. To me it wasn't as tight of a fit as it should be. I got out my selection of spare o-ring stock and found one that made the fit tighter. This is concerning to me as in my research and talking to others that are familiar with these engnes, it is said that one thing you should do on any used ls/vortec you get is to replace the oil pick up tube o-ring because oil pressure problems have been traced to this o-ring becoming flattened and losing its seal, and thus low oil pressure. Don't really want to go the through the hassle of returning or exchanging a shipped product. Has anyone else that has used this pan experience the same issue? I may be overthinking this but don't, of course, want to wind up with low oil pressure because of it.