yea, i noticed my rappy pops a little now that its colder out.

 

i just pulled mine, it soundes a little better, it adds a little power not much. We took out that screw, but we had to take a hammer to the lip and hammered it in, after that we pulled and pulled, it finallly came out, but now its junk.

It does smoke alittle, mostly when i got stuck on a hill, that nice blue smoke came out of the exhaust.