The Mishimoto MMAI WRX 01P Emission System was exactly what my car needed. As a result of my tests, I determined that it delivered a noticeable increase in horsepower and acceleration. The polished finish also added a sleek look to my engine bay. The only downside I experienced was a slight increase in engine noise, but it wasn't too bothersome. Overall, I highly recommend this product to anyone looking to improve their engine's overall performance.
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