I was looking at the side of the car today, I noticed that there's a small side on the left side of my left rear RB muffler (6 months old). My car is lowered by .75 inch with Eibach springs and I dont think I bottom out that much. Is this a normal occurance on these cars with rocks or bumps denting the muffler?

 

Not really. Stainless is pretty strong. Probally just bottomed out. Man, that sucks. Stock ride height is good for somethin'!!!!!!!!