2006-2009 Civic Si 60mm Axle-back Exhaust (INJSES1577)Enhance the sound and performance of your 8th Gen Civic Si with the Injen SES Performance Axle Back Exhaust System. Designed for both Coupe and Sedan models, this system features 60mm mandrel bent stainless steel tubing to ensure smooth, unrestricted exhaust flow and maximum power gains. Handcrafted to deliver a deep, aggressive tone that highlights the high revving character of the K20 engine, this exhaust provides a significant aesthetic and audible