What Ive been thinking of doing (since I just spent like 4 grand total on my car, Im poor now lol) is grinding some material off the plate that covers the wastegate. I mean it has to make a 90degree turn to get into the downpipe, but what if you angled the material so it only has to make say a 60 degree turn? Would be beneficial Id imagine, plus ALOT cheaper.

 

Yeah that should help the boost creep out. Give it a shot.