O.S. Engines PowerBoost Pipe II for 50/55 Engine FEATURES: Developed for exclusive use with the Max-55HZ-R, 55HZ and Hyper 50SX-H engines Aluminum construction with polished natural finish Delivers e INCLUDES: Powerboost Pipe, two each M3x35, Socket Head Screws, M3 Nut and M3 Spring Washers, one M4 Nipple, Exhaust Gasket, Tube and Binding Strap an INCLUDES: Powerboost Pipe, two each M3x35, Socket Head Screws, M3 Nut and M3 Spring Washers, one M4 Nipple, Exhaust Gasket, Tube and Binding Strap an