Crankshaft kits include crankshaft, top end bearing, premium main bearings and a complete bottom end gasket set that includes all seals and gaskets needed to do the jobOnly one part number to stock and orderCrankshafts are factory assembled and precision trued to OEM specificationsDouble-forged Wiseco connecting rods maintain superior dimensional consistency through improved grain flowShot-peening eliminates residual stresses and smoothly blends the rod forging surfacesCorrosion-resistant surface treatmentTop and bottom end rod bores case hardened to 58-62 RC to optimize bearing running surfaceCrank pin bearing radial running clearance is optimized to ensure maximum performancePrecision honing ensures ultra round bearing surfacePrecision engineered oiling slots maximize rod strength and bearing lifeDouble-drilled small ends provide the piston pin with extra lubrication and cooling, reducing distortion of top end due to thermal transfer from the pistonSilver-coated bronze phosphor thrust washers, with dimpled design to increase oil retention and reduce friction between rod and washer interfaceCrank pin bearings are manufactured from the highest quality hot rolled steel; case-hardened to 58-62 RCCaged needle roller bearings provide the highest possible rpmPrecision machined crank websWiseco complete gaskets kits are made from premium materials for maximum sealing and reliability; all bearings are OEM-quality for reliability and performanceConnecting rod kits come complete with rod, crank pin, crank pin bearing, top-end bearing and thrust washers