60.5mm is equal to 2.38 inches. 60mm is very little less than that. Half a millimeter, which is nothing. do you think this will be a good set-up with a stock cat? i haven't really looked at any cats in depth, so i have nothing to go on. i might, later on down the line, build up the internals of the engine. probably with cams, cam gears, valves, springs, etc. basically the whole head. do you think for now, with everything pretty much stock (have aem on there), i will benefit now and later with this set-up?

what you guys think? thanks.

oh yeah, what is the piping made of on the apex n1? is it coated or what?