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Designed to extract maximum power from naturally aspirated K24Z7 engines, our high flowing design delivers significant power and torque gains throughout the power band. Updated for 2017, the V2 All-Motor Downpipe now uses an investment cast 3″ stainless steel cobra head transition. By reducing back pressure and increasing flow, this is the highest flowing and strongest downpipe available for the 9th Gen Honda Civic Si and Acura ILX.