Hi-Temp Clutch Spring Kit - Belleville - YZ450F Developed with and to enhance performance of OEM pressure plates as well as Hinson clutch baskets, inner hubs and pressure plates, Developed with and to enhance performance of OEM pressure plates as well as Hinson clutch baskets, inner hubs and pressure plates, Made out of high-temperature steel to outlast anything else on the market, Made out of high-temperature steel to outlast anything else on the market, Highly resistant to losing strength due to high heat from 4-strokes, Highly resistant to losing strength due to high heat from 4-strokes, The correct stiffness to handle high horsepower engines, The correct stiffness to handle high-horsepower engines, Provides optimum hook-up with minimum heat build-up, Provides optimum hook-up with minimum heat buildup, Made in the USA, Made in the U.S.A.