These R&G Aero Crash Protectors feature our stylish, aerodynamic Aero Bobbins and come with everything needed, including strong and lightweight steel blocks, to allow this kit to be fitted with no drilling of the fairing. Suitable for the Aprilia RS660 21- models. R&G Crash Protectors offer core motorcycle protection, keeping the frame, engine, fairing and other critical components off the ground in the event of a crash, drop or slide.R&G Aero Bobbins are a stylish, aerodynamic, teardrop shaped bobbin improving on the original good looks of our highly successful and popular standard round bobbins. Fitted with a removable end cap which hides the bobbins fittings, this sleek design looks superb and is a winner on road and track!R&G Aero Bobbins from R&G Racing - the market leaders in crash protection and the only insurance approved crash protectors on the market. As used by some of the worlds top race teams, what better endorsement do you need! R&G Racing – innovation not imitation!