0930-0105, 01-03-118. Developed and designed in conjunction with the Kommander himself, Steve Webster, as a Blowsion exclusive offering. One-piece Yamaha billet aluminum/CNC performance cylinder head kit provides the best of both worlds with excellent horsepower gains, better cooling capacity and a price that is easy on the wallet. State-of-the-art heads use the same replaceable domes of Blowsion's popular 2-piece girdled Yamaha heads and utilize an improved squish band design for easy tuning and more compression for pump gas friendly horsepower. Up to 70% better cooling, increased reliability and CAD designed combustion chambers ensure maximum performance and long engine life. Girdle kit available for those looking for maximum cylinder support. Head includes all hardware needed for installation. Domes, two required, are sold separately; see recommended products