Our SP1584 intake provides an intake growl that will surely excite your senses as you open up your Honda Civic Si and let that turbo spool. The soul of this intake is found within 6061-T6 aluminum air intake tube that provides a smooth uninterrupted path for highly efficient airflow. Our engineers have painstakingly designed the intake to provide the highest levels of safe power, along with clean aesthetics that will impress every time you open your hood. In addition to the impressive power increase, the Injen team has ensured that a safe Air fuel (A/F) ratio has been maintained throughout the power band. , , Additionally, the SP1584 intake includes a fully serviceable Injen SuperNano-Web dry air filter, which provides increased filter surface area allowing for greater airflow and unbeatable filtration. If that's not enough, the Injen SP performance intake provides power you can hear and feel! On our dyno, the SP1584 put down an impressive 23 additional horsepower and 21 pound-feet of tire-scorching torque! , , This intake provides an aggressive and throaty tone that is unmatched in the aftermarket and one that you?ll enjoy every time you smash the accelerator! Want to add that personalized touch to your intake? You?re in luck, as Injen also offers this intake system in three amazing finishes ? SP1584BLK (Laser Black), SP1584P (Polished), and finally SP1584WR (Wrinkle Red). To top it all off, this SP CAI kit includes the unbeatable Injen Technology limited Lifetime Warranty!