I've gotten 16,600rpm using a TT Pro .46 and Jettstream muffler on a 9x7 APC prop, so If the Evo 46nx can get up to at least 15,500rpm on a 9x7, you're golden. I've been told the red Jett mufflers are 15,500-17,000rpm pipes. They act kind-of like a governor as they just stop making power over 17k anyway.