Aprilia RS660 Jet Prime Velocity StacksThese velocity stacks we have developed are necessary to improve the air intake during the phases of opening the throttle control. Due to the particular shape, this allows a reduction in air turbulence during the suction phase, improves the air intake from inside the air box, facilitates the intake and reduces the response time of the engine especially when you have a violent opening of the throttle. The shape and length of the velocity stack has been
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