TOMEI VALVE GUIDE SET For NISSAN GT-R R35 VR38 163303Brand TOMEI Product Number 163303 Compatible Car NISSAN GT R R35 Compatible Engine VR38 Product Description We chose to use Phosphor Bronze (Cn Sn P alloy) to make our Valve Guides, for its highly tensile and superior heat transferring ability, which is vital in high power and high RPM outputting engines. Since race engines these days require more power at higher RPM use, these engines now experience more extreme heat conditions. These conditions will