Order Includes: 2 x Exhaust Valve, 2 x Inner Valve Spring, 2 x Valve Stem Seal, 4 x Valve Cotter. Compatible with Yamaha models: Grizzly 550 YFM550 4x4 2009. Part Number: Exhaust Valve: 28P-12121-00-00, Inner Valve Spring: 5VK-12113-00-00, Valve Stem Seal: 5H0-12119-00-00, Valve Cotter: 4G0-12118-00-00. We strongly suggest comparing the posted picture to the unit(s) that needs to be replaced..
