I have the base and have had no issues at the drag strip. Best time bone stock with it was 13.3 1/4 mile. As far as auto cross I don't know. Honestly I'm not sure if doing this is worthwhile but it's your car, your money, and your time.
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Takeda TR3009P Short Ram Intakes, Custom Dual Exhaust, X-Piped with 18" Resonators & TopSpeed Axle Backs. EVO-R Led Third Foglight,
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