Seller notes

Selling Tomei Valve Guide Set for Nissan RB20 and RB25 Engine We decided to make our Valve Guides from Phosphor Bronze (Cn-Sn-P alloy) 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 with leaner AFR mixtures, these engines now experience more extreme heat conditions which risk with the rapid deterioration on these valve train related components. The Phosp...

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