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The unique design of Vforce3 reed valve system improves performance and durability. Among the benefits are increased bottom end and a stronger mid-range but also a longer top-end. Throttle response is sharper and quicker and the petal wear is reduced.  

Vforce4 reed valve system is the next step. Completely redesigned, among the features are an airfoil shape at the reed tip area, pre-curved reed petals and a further increase of the petal area by 10% which equates to more air flow. The initial throttle response is crisper and the midrange stronger. Vforce4Ri includes a custom intake manifold boot hat offers a straighter shot to the intake that greatly enhances both airflow and performance.

 
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