K&N Performance Intake Kit for Ford C-Max/Focus II / Volvo C30/S40/V40/V50/V70 / Mazda 3/5 Exterior Styling>Hood Struts The one-piece sealed housing utilizes

The one-piece sealed housing utilizes the all-new Injen Twist-Lock System to securely attach the huge 8-layer oiled cotton gauze air filter in place which eliminates the use of unnecessary parts and provides one of the simplest installations available

Injen is proud to say that the EVO1501 Evolution Cold Air Intake system is the very best intake system for your Civic Si that money can buy

Digital Boost/Vacuum gauges are also available for gasoline or lower boost applications

These arms are adjustable and give you the ability to correct the camber setting on lowered S550s

K&N Performance Intake Kit for Ford C-Max/Focus II / Volvo C30/S40/V40/V50/V70 / Mazda 3/5 Exterior Styling>Hood Struts The one-piece sealed housing utilizesThe K&N 57S 4000 Performance Airbox replaces the restrictive factory air filter and air box lid. K&N performance air boxes are designed to dramatically reduce air flow restriction as well as smooth and straighten air flow. This allows your engine to inhale a larger amount of air than the factory air filter assembly. More air means more usable power and acceleration throughout the engine's RPM range. The 57S 4000 Performance Airbox comes with an