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i am going to buy a 2007 civic coupe lx and i am planning on doing some work on it. i was going to put a greddy ti-c exhaust on it and a k&n air intake and filter...i was wondering if anyone knows if this would create problems with the warranty? i want a good exhaust on it cuz its gotta sound sick haha but i also dont want to break the warranty. also would it affect the warranty if i put in better speakers? i plan on putting in two 12 inch alpine type x subwoofers and i definitely need better than stock speakers if im putting that in my car...basically i want to know if upgrading the car would break the warranty, and if it did break the warranty then what would that mean...