it would be dissapointing on an 18x10, I normally use a 16x15, this has achieved 140mph straight and level, I tried a apc 18x12 pattern 2 peice component, and would describe it as ok, I think with nitro fuel the 16x16 would be on the button. If using this as a reference, remember that I do have a os tuned pipe. on a factory muffler or pitts the bgx is a little dead, but your nitro fuel may make up for this.

With regard to snap, go back through this thread and refer to c of g and snap, h9s recomendation is 1/4 too far back.