KOYO Crankshaft Main Bearings are meticulously manufactured to the highest OEM specifications using premium materials. They ensure a perfect fit for both OEM and aftermarket crankshafts, providing durability and superior performance. Specifically designed in the 6304/C3 category, these bearings meet the rigorous demands of high-performance engines, ensuring minimal friction and extended engine life. Ideal for use in high-speed, high-temperature applications, KOYO bearings are a reliable choice for maintaining the efficiency and longevity of your engine. Compatible with various HONDA and KAWASAKI models, these crankshaft main bearings are essential for those seeking uncompromising quality and dependability.