mazdamn
+1y
Mine didnt get hot at all. I did, after about 6 or 7 months pull up the carpet to put down deadener, and I went to the store with the carpet out, and cruise at 30 mph for about 2 hours after...it was slightly warm in comparison to the other side, but not enough to cause concern. The muffler i had was a bullet-type...i got it for $5. Air was never trapped inside, so that may help.