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- 2000 Mazda Protege
Lets just say I made a custom one and it didn't work out with my ecu etc...car runs like crap, but seems faster & sounds great haha. (it's much too large @ 3") I just want my good gas mileage back and my car to run somewhat normal haha. Please help!! I NEED THE FULL PIPING AS WELL AS THE FILTER BOX (dance)