Moose Offroad Valve and Spring Kit - Yamaha YZ450FX | YZ450F - M80-81100

Stainless steel conversion kits include only what’s needed to convert your head to the long-life stainless steel Black Diamond™ or White Diamond® intake valves. Extend the life of the valve train and intake components by as much as 4x over the OEM titanium parts. Valves are designed to not only offer the best life span over OEM, but also designed to flow and perform better than OEM components. Components are created using Finite Element Analysis (F.E.A.) software, as well as proprietary camshaft analysis and spring design software to ensure consistent performance and accurate designs. Specifically designed and engineered for each application. Made in the USA.