OK guys but why you saying its not boost creep for sure? I've read a lot of threads on DSMtuners and external WG is not always cure for that problem.

Anyways I have a similar problem and if I dont fix that problem somehow I will set that stupid car on fire. I have a 2,5 in DP with no cat and 3 in. exhaust. With the silencer in there is NO boost creep. I can control my boost with no problem. But when I open the exhaust it will creep up to like 23 psi and more. I've read somwhere that tubular o2 housing and ported manifold could help a lil, but it didn't. What should I do next?