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Discussion Starter · #1 ·
Ok so i have my new wrx. I want a turbo-back, but i don't know how to get around the stupid smog test s**t. My question is, can i still produce good power increases without the key components (downpipe, up-pipe)? If so, which cat-back system delivers the most power? Let me know, because i', pulling my hair out over this.
 
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