This product fits the following: MBK-Booster 50 MBK-Booster 50 12 Zoll (04-) MBK-Booster NG 50 (-98) MBK-Booster NG 50 (99-) MBK-Booster Naked 50 MBK-Booster Rocket 50 MBK-Booster Spirit 50 MBK-Booster Track 50 MBK-Stunt 50 AC (-04) MBK-Stunt 50 AC (04-) MBK-Stunt Naked 50 Yamaha-BW´s 12 Zoll (04-) Yamaha-BW´s 50 Yamaha-BW´s 50 NG (-98) Yamaha-BW´s 50 NG RS (99-) Yamaha-BW´s Spy 50 Yamaha-Slider 50 AC (-04) Yamaha-Slider 50 AC (04-)  Direct fitting foam pad panel filter for the bike listed above, cut to shape from our twin core Ramair Aeriform foam. Ramair twin core foam is unique and like no other on the market. It is impregnated with a polymer retention agent to give maximum dust filtration along with outstanding performance. Optimum filtering characteristics when dry which can be improved upon by applying our specially formulated oil. Perfectly interchangeable with the original O.E. panel filter and they are especially suitable for high-performance engines. Tests carried out by MIRA show many Ramair foam filters to outperform rival manufacturers by up to 40%