Up for sale is RACE TECH 2008-2017 450 XC-F KTM SHOCK SPRING 5.0KG. The vendor part number is SRSP 632550. Please read the title to know what is for sale HIGH PERFORMANCE SPRINGS: RACE TECH MANUFACTURES PRECISION HIGH PERFORMANCE SPRINGS THAT HAVE A HIGH STIFFNESS TO MASS RATIO. IN OTHER WORDS; OUR SPRINGS ARE LIGHTWEIGHT FOR THE THEIR PARTICULAR RATE. THIS REQUIRES THE FINEST MATERIALS AND PROCESSING.