[Ziggyrama]

Originally Posted by isotopesope

08+ wrxs have different BPV, TMIC, and IM than the STi. lots of plastic! i swapped my plastic BPV to remedy this strange off throttle "squeak" i was getting between 3k to 2k.

i tried modifying my stock one first, but it only changed where in my RPM band the squeak was happening. others have had great success with the mod though.

Good point. I forgot WRXs get lots of plastic under the hood these days. IIRC, the WRX TMIC does not hold up well to higher pressures. It's probably a good idea to upgrade it for stage 2.

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