Jetprime Velocity Stacks Kit - HSBK-ATR660 For RS660, Tuono 660 *See detailed fitment list*
Jetprime 660 Velocity Stacks Kit - HSBK-ATR660
These velocity stacks have been developed to improve the air intake during the initial phase of the throttle opening.
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 studied by JetPrimes R&D department to reconcile the engine at different engine speeds, to increase the suction strength and to improve the torque curve at low engine speeds.