i am using a jb3 and i put stock piping on and i didnt get compressor surge that i could here of but thats cuz of the diverter valves i am sure ... but with the stock piping and dv's on it doesnt feel as fast ....

plus there is no reason that if it wored fine for 9 months that one day it just stops ( for no reason regular driving ) and can not go back to ho wit was

i just think it might be time to get another m3 lol