Tomei Valve Guide Set - Nissan RB25DE(T)/RB20DE(T) Mitsubishi and the ability to fine

and the ability to fine tune your idle with the plate position & idle air adjustment screws

20470SA000

are unlikely to be born in the next 10 years

with Hardened being the firmest compound

but they're also perfect for securing your alloy wheels

Tomei Valve Guide Set - Nissan RB25DE(T)/RB20DE(T) Mitsubishi and the ability to fineWe 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, Intake, 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 increase the deterioration rate on these valve train related components. The Phosphor Bronze