This left-hand side R&G Race Series Engine Case Cover fits the Aprilia RS660 20- 24, Tuono 660 21- 24 & Tuareg 660 22- (LHS Alternator Cover RoadRace Version)- models, protecting the exposed casing from damage in the event of a crash, slide or drop. These exciting new engine case Covers have been developed in collaboration with selected race teams and crash tested within the R&G Racing Suzuki GSX-R Trophy. Crafted from 4mm polypropylene for strength, durability and good looks.R&Gs Race Series Engine Case Covers have been specially developed at the request of race teams and riders alike. They include a replaceable puck or slider on the impact face, giving the case not only more meat to grind through to further enhance the protection offered by a standard R&G Engine Case Cover but also offering an easy low-cost fix should you only have a minor slide, crash or drop. Engineered to allow just the puck to be replaced and your cover to be reused again and again!