Prox Racing Parts 28.2487-1 Steel Replacement Exhaust Valve Fits: Yamaha YFM 350 Warrior 1987-2004, YFM 350 R Raptor 2005-2013, YFM 350 Wolverine 1995-2008, YFM 350 Bruin 2004-2006, YFM 350 F Grizzly 2007-2013 Specs: Location: Exhaust; Material: Steel; Number of Valves Included: 1; Head Diameter: 34.00mm; Length: 100.50mm; Stem Diameter: 7.00mm ProX steel valves are manufactured of premium grade steel to exact OEM specifications and tolerances Manufactured by the leading OEM factories in Japan and are a direct and cost-efficient OEM replacement ProX steel valves can be used in combination with all the OEM valve train components like valve springs, guides, bases and retainers