hi, im looking to buy some new exhaust tips for my mustang, i definitely want chrome and slant cut with atleast a 3.5 or 4 inch end diameter, but my question has to do with the length of the exhaust tip, i've seen some from 22 inches to 6 inches, does this change the sound? my car has a flowmaster 40 series exhaust on it and im looking to make the sound deeper (more of a deep growl) if possible, just not sure what length the tips need to be or if that even changes the sound at all. thanks!