Jetprime - Precision Control, Supreme Quality Jetprime Velocity Stacks for Aprilia RS660 Tuono 660 Tuareg 660 CNC-machined from aircraft quality 7075 T6 aluminium optimised to improve engine performance across the rev range Part No. JP ATR 660 Model compatibility Aprilia RS660 2021 - current Aprilia Tuono 660 2021 - current Aprilia Tuareg 660 2021 - current