TOMEI – Valve Guides – RB25DET R33 R34

SKU: 4289
Available on back-order


TOMEI’s Valve Guides, expertly crafted from Phosphor Bronze, offer unparalleled tensile strength and superior heat transfer capabilities?critical for high-power, high-RPM engines. Designed to thrive in modern race engines demanding increased power and leaner AFR mixtures, the Phosphor Bronze material minimizes friction, ensuring optimal clearances. This not only reduces stress on the valve train but also prevents seizures and cracking under extreme loads. Tailored for Nissan Skyline R33 – RB25DET and R34 – RB25DET, TOMEI’s Valve Guides epitomize durability and performance in the world of high-performance engines.

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TOMEI excels in crafting Valve Guides meticulously using Phosphor Bronze (Cn-Sn-P alloy), renowned for its remarkable tensile strength and superior heat transfer capabilities?an absolute necessity for engines operating at high power and RPM levels. In the realm of contemporary race engines, demanding more power with leaner AFR mixtures and navigating elevated RPMs, the heightened heat exposure poses a potential threat to the longevity of crucial valve train components. The incorporation of Phosphor Bronze, with its notably low friction attributes, ensures optimal clearances are maintained, effectively mitigating stress on the valve train. This strategic choice not only prevents seizures and cracking under intense stress loads but also enhances overall engine performance. Specifically designed to cater to Nissan Skyline R33 – RB25DET and Nissan Skyline R34 – RB25DET, these Valve Guides epitomize TOMEI’s commitment to delivering components that stand up to the rigors of high-performance engines.


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