I recently installed a warpspeed y-pipe and it sounds great except for the subtle knocking or rattling that it gives out as i accelerate. Does anyone else have this sound?

 

trying searching for it.. if I can remeber correctly there were a few members who had problems with the heat shield contacting something

 

if your under the car by looking back to your exhaust (i.e. your engine is behind you if your under the y pipe), look to the left of the cat...there will be a heat shield there....just bang/bend it out of the way, and you should be good