Replacement air filter element in OEM quality. Air filters should be changed regularly because a contaminated air filter reduces the efficiency of the engine and increases fuel consumption. The replacement air filter element corresponds to the air passage of the factory-installed air filter and is suitable for horizontal Minarelli / China 2-stroke engines, including the following models: Aprilia SR 50 Netscaper (Minarelli) Aprilia SR 50 Stealth / Scarabeo 50ccm CPI Bravo, Hussar all from Bj. 03 2T CPI Popcorn, Sport all from Bj. 03 2T Longija Firefox, Versus, F1 50ccm 2T Malaguti F12 Phantom from Bj.