Seller notes

Fits 2011 Yamaha YFM450 Grizzly 4x4 Auto Black Diamond Exhaust Valve RAD Powersports Exhaustvalve 34mm (Std) Black Diamond Valves All RAD Powersports Black DiamondG Stainless steel valves are impregnated by a special German process to a depth of .002, with a surface build up of .0002. This Black Diamond process improves wear properties, reduces friction, and provides resistance to corrosion and wear that is superior to chrome and nickel electrolysis plating. Each valve is designed using Finite E...

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