EBZ5000Q blower has noise level of just 65 dB. while moving air up to 596 c.f.m. at speeds up to 142 m.p.h. Strato-Charged 47.9-c.c., 2-cycle engine meetsPhase 2 and CARB Tier II standards without catalytic converter by introducing fresh air into engine between exhaust gases and fresh charge of air/fuel mix. FreeFlow 2-stage air cleaner eliminates dust that can cause engine overheating or piston seizure.