Headers, Y-pipe, exhaust and muffler kit
Hey...i should be getting my custom headers, ypipe, exhaust and muffler kit in soon from CALI. and i was wondering if anyone knew:...if i installed the headers and ypipe ONLY and left my custom cat back exhaust and muffler that i have now...will i still be hitting the +30 hp stat? L8r, moe 

- xXsolaraXx
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