Moose Racing has dedicated itself to providing the rider and racer with the highest quality and best performing products available. With thousands of items ranging from racewear to casual apparel to boots and the finest in hard parts and accessories, Moose Racing offers the most comprehensive list of products in the industry to satisfy all of your riding needs. Stainless steel construction gives superior strength and appearance. Swivel hook design eliminates binding, extending spring life. Available for most late-model 2-stroke and 4-stroke models. Sold as a pair. Made in the U.S.A. When measuring for exhaust spring length, please use the following information: Exhaust springs should be measured when they are off the vehicle. Wear eye protection when removing. The length measurement should be taken from inside hook to opposite end inside of hook.