Nismo '99-'02 Nissan R34 GT-R R-Tune Air Cleaner Duct -

This Nismo duct reduces compressor intake pressure by 30% during pressure peaks, as well as decreasing air-path pressure. Installation is quick and easy, just like the standard Nissan air cleaner. This duct can be attached without modification when used with the Nismo R-Tune carbon hood, genuine aluminum hood, genuine carbon hood for V-Spec, and with the Nismo air inlet pipe or genuine inlet pipe. No re-adjustment is required for use on public roads.