i recommend the active autowerke downpipe, its EPA approved with GESI cats and no check engine light guarantee.
We sold hundreds of these downpipes and i can vouch for AA's quality and support
That's a common misconception that's been proven wrong a number of times.
Third-party dynos posted by VM Performance showed that aftermarket air intakes improve the airflow, and their dyno comparison showed a gain of 8 whp on a fully stock car and 15 whp on a tuned car.
BMS tests showed that...
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