Increased Power The C.A.R.B certified COBB Tuning SF Intake removes a pre-turbo restriction in the stock intake system. Power gains become more pronounced at higher boost pressures. This dyno graph shows the power gain across the rev range at 17 psi simply by installing this intake. Increased Induction Sound Enjoy the increased snarl from your engine and hear the turbo spool more clearly with the addition of the COBB Tuning SF Intake system. Turbocharger induction noise and bypass valve venting sound is much more audible using this intake system. Easy to Install The COBB Tuning SF Intake was designed to be easy to install without having to modify your car or remove the bumper skin. Installation requires no cutting or trimming or removal of the bumper skin or bumper support and can be completed with simple hand tools. Simply remove the stock airbox and bolt the SF intake into place in just minutes! No Tuning Needed The SF Intake for the R35 GT-R has been painstakingly designed to eliminate the need for a specific intake calibration. This intake is 100% compatible with the stock calibration as well as all Off the Shelf Accessport maps. Constructed of 2.75-inch diameter aluminum tubing with K&N cone filter elements and 3-ply silicone couplers, the SF Intake System is easy to install and requires no special tuning.