20pcs 57mm Exhaust spring Pipe Muffler Springs Swivel 57mm Motorcycle Dirtbike20 PACK New Exhaust Seal O Rings and Springs For Husqvarna Gas Gas 250 300 2 Stroke Features: Aftermarket exhaust swivel springs kit. manufactured from stainless steel to resist corrosion. They include a swivel end to improve the fit on to all types of exhaust pipes. Swivel hook design eliminates binding giving extending spring life. Hold tight against the cylinder flange with springs, the benefit being that the pipe is less likely to break from