Keith,I am involved in just the sort of thing's that you are talking about. Yes, most dealer's here sell aftermarket goodie's, such as exhaust, programmer's, module's, lift kit's,etc. What the public refuse's to understand is, the dealer may be OK with it, but if a Ford rep is there checking on a warranty issue and see's these modification's the dealer is quick to throw them under the bus, so to speak. I sell and install all of the above, but it is known upfront, if you play, you pay. I do not expect for Ford, or any other dealer to pay for something that is directly related to a failure from an aftermarket part, but if a guy need's a waterpump, and the tech see's an aftermarket air cleaner and deny's warranty, then I have issue's. I hope I did'nt over step my bound's. What are your thought's?