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Got a new Si?. Give it the airflow it deserves. Injen's new cold air intake (CAI) SP1581 adds power gains of up to 21 hp and 19 ft. lbs. of Torque. This Civic Si intake uses a mandrel-bent aluminum tube, allowing for smoother, uninterrupted airflow straight into the turbo.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.