I really enjoy reading all the posts about all the mods for the Challenger and wanted to pass along a real disturbing issue regarding mods from another manufacturer. My friend has 5.0 (coyote) Mustang and I was reading about their #8 cylinder failures as a design flaw on some Mustang sites and came across Ford's response. Ford issued a TSB (It's real) instructing dealers to void any engine warranty claim if there is (or was ) any modification to the power train including tuneing, CAI's, and even exhaust mods such as cat backs. I hope this is not setting a trend. Don't shoot the messanger please.