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.