What up guys and gals, so recently I had magnaflow xpipe put on my car. Sounded great and felt great , felt the difference actually even though it was minimal. Since my car is a little low I have scraped the bottom a few times , not too bad. There is a hissing/spitting air sound coming from right in between the two catalytic converters. Doesnt start right away, but will after a few minutes. Could any one tell me if it is normal or if I might have cracked something and would it sound like that. I put my hand in that general area and I can feel air blowing out right there. This is just after is fixed an exhaust leak as well.