Mike, no problem getting under 98dB on the stock mufflers with a BME 102. A MenzS 26-10 2 blade will be right on the edge with a broken in motor turning 6700 rpm static. My IMAC prop of choice for my 102 is the MSC 26-10 which turns 6100-6200 rpm while producing 39 pounds of thrust according to my Digital fish scale .....er.........THRUST GAUGE. That's only a pound or two less than the MenzS produced, but is a BUNCH quieter (less rpm). Noise level was less than 96 dB over hard surface! Downline braking is a LOT better also, since the MSC blades are a lot wider than the Menz blades.