Crankshaft Racing Nk105.15CrankshaftHigh quality crankshaft from Naraku Made in Taiwan Produced according to the OEM guidelines of Japanese vehicle manufacturers for perfect repairs and durability This heavy cheeked HPC racing crank increases the pre compression in the cases for improved filling. The extra inertia improves performance and the performance moves to the upper rev range. The crank design, with plastic inserts, only slightly increases the mass over the original