Unleash performance gains of up to +10 HP and +11 lbs. x ft. torque with aFe's Takeda 3"-2 ?" mandrel bent, 304 stainless steel cat-back exhaust system for your Honda Civic Si Sedan with I4-1.5L (t) engine. This exhaust system is 100% hand TIG-welded by certified craftsmen for race proven strength and durability and designed with dual, free-flowing 304 stainless steel muffler s to improve performance across the power band while maintaining an aggressive tone and long lasting, good looks. Finished with dual 4-3/4" X 4-1/4" oval polished stainless steel tips and etched with Takeda brand logos gives the Civic Si a stylish, custom appearance. Takeda 3 IN 304 Stainless Steel Cat-Back Exhaust System w/ Polished Tips Honda Civic Si Sedan 17-20 L4-1.5L (t) Honda Civic Si Sedan 17-20 L4-1.5L (t)