i agree with above,all the front mount mount coolers do the same,people will give you they're opinions and they will all differ! i personally use a GRS front mount and the only reason i had to modify my bumper was to keep the spotlights on!! and even then you cant notice it. my ACT NEVER goes above 34.

it sounds like you have a boost problem more than plugs,leads etc. if its losing boost you will have no power! which could be down to a weak actuator. have you checked what boost it is producing?