Help........ Just put on my new DR.D stainless full system. Per Dubach Racing, I changed the main jet to a 162 and dropped the clip to the 4th position. It is now backfiring a little bit on decelleration, and it is shooting out flames when I hold it at about quarter throttle in neutral. Air leak??? Is there supposed to be a clamp on the header and tail connection. It did not come with one, and the stock one does not work. Also, the header pipe was glowing so bright, you could have lit a cigar. Is this normal. Any suggestions? Running it at sea level.