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i owe a 2009 mustang gt auto.. i got it 4 like 2 months now. i am think abut putting a magnaflow exhaust cat back & x pipe.. i know its gona affect my warranty, but would it termate my whole warranty?..
First off, really old thread, second off you might want to check out the 05-09 section.
But, if you were to replace the stock midpipe and cb, your warranty would be fine. The only way it would be affected is if they can prove that whatever aftermarket part you installed, caused the problem.