SITOPLUS, for 2-stroke engines, is an exhaust system line for the best-selling motorcycles and scooters in Europe that, while looking like those originally fitted, are completely re-designed inside and guarantee that the engines will perform better, especially at low to medium revs. The final result is a clear improvement in torque and acceleration. All in compliance with legal requirements, which makes SITOPLUS a "special" product but regularly approved. Compatible with: - Aprilia: SR 50 Min.AC 94-_S - Mbk: Booster 50 euro 0-1_S, Booster 50 euro 2_S, Stunt 50 euro 0-1_S, Stunt 50 euro 2_S - Yamaha: BW's 50 euro 0-1_S, BW's 50 euro 2_S