i think that will help do you

 

If your problem is in the 1/4 to 3/4 throttle range it will probably help

 

my pipe dose the same thing it is vary small and realy realy load i mean my fraind come over with heas raptor 350 with the baffull out and my scrambler is all you code here i shode take a pic of the pipe i swaer it is 4 inch all the way around if not smaller