Performance Air Filter for Honda Civic SI (2012-2015) with 2.4L EngineBMC High Performance Replacement Air Filter for 2012 2015 Honda Civic Si 2. 4L The ninth generation Honda Civic Si brought a new era of performance to Honda's iconic sport compact lineup. With its larger 2. 4L K24Z7 engine producing 201 horsepower and that signature i VTEC character, this generation proved Honda's commitment to naturally aspirated performance in an increasingly turbocharged world. But even Honda's engineers had to make compromisesand