OK, so there is no benifit what soever going with a smaler drive performance wise? I guess that M's r low geared as is. I know there's more then enough room for a 2.5 track
I put a 2.5'' a on my girlfriends M7 162 and it works awsome with stock drivers! It has lots of power and i never did no clutching or anything, so your M8 will rock onit! I would get the stiffer camo 2.5'' track if i where you!