I've own my 7 for about 2 months. Never had any problems regarding my big HKS exhuast.
but ever since this one day when I needed to have my car towed to the gas station.
the tow truck scraped my exhaust and made a slight dent.
that I don't mind much, however I started noticing my bumper is starting to melt! How should I fix this messy problem?
thank you

 

Sounds like he bent the muffler up into the bumper. Either heat the tube and then bent it back, or cut out the bent section and weld in a new piece.