after researching many threads and doing my homework i have come to the conclusion that flying a tf beechcraft bonanza with a 61 size motor is a no go and have read that it needs something more like a 91fx which raises my question where to get an in cowl muffler for it due to the bonanzas front retract assembly muffler choices are VERY limited aside from making my owm which i do not have the means to do so what can be done about this situation i am sure the piper arrow and t-34 have the same situation i hope the right people are listening to this thread we need a 90 size in cowl muffler...