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  1. 02 Wrx Boost Spiking Stage 2

    Engine Modifications
    Hello all, I recently upgraded to a stage 2 setup on my 2002 wrx. This setup includes Turbo Xs Upipe and full turboback system with a high flow cat. Other mods include SPT cold ar intake and Cobb Ap Stage 2. I have read some postings on this but have yet to solve my problem of boost...