Triumph Street Triple 765RS & Daytona 765 Moto 2 Short Race Velocity StacksProbably the best performing velocity stacks on the market. These stacks when tested against longer race stacks and genuine factory stacks out performed everyone in just about all rpm areas, especially the areas that count, drive out of corners and a little bit more at the top end. As Del Boys says 'what can't speak can't lie' and the dyno can't speak. Printed from the best quality plastics mix these are strong and of course petrol proof. AND DYNO