OS Giken – RB31 Race Engine

SKU: 3504
Available on back-order


Unleash the full potential of your RB26 with our high-performance RB31 upgrade. Engineered for power outputs up to 1400hp, this pre-assembled bottom-end kit features an 88mm stroke and customizable 87mm pistons for a 3.2-litre capacity. Built with precision using an N1 block and incorporating essential enhancements like an oil restrictor and piston cooler jets, the RB31 guarantees unparalleled durability. Pair it seamlessly with the OS Giken 8-bolt clutch for optimal performance. Shipped via Sea for secure transport due to its weight, this upgrade transforms your driving experience with a perfect blend of power and precision.

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Unlock unparalleled performance with our cutting-edge RB26 upgrade. Our meticulously crafted, pre-assembled bottom-end kits are engineered to effortlessly handle power outputs of up to 1400hp. Elevate your driving experience with the RB31, boasting an impressive 88mm stroke and the option for 87mm pistons, delivering a formidable 3.2-litre capacity. Customize your combustion chamber volume with specially shaped pistons available through bespoke orders.

The RB31 is meticulously constructed using an N1 block, featuring the same thoughtfully designed spacer and liner arrangement as the renowned RB30. Benefit from enhanced durability with an incorporated oil restrictor and piston cooler jets. For optimal performance, pair the RB31 with the indispensable OS Giken 8-bolt clutch.

Experience a seamless delivery process ? our kits are shipped via Sea for your convenience, ensuring secure transportation due to their substantial weight. Upgrade your RB26 with confidence, unlocking a new realm of power and precision.

Additional information

Weight 25 kg


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