any dyno shops in charlotte nc

Originally Posted by Bushguts

i dont know if im posting this in the right section so here goes. i drive a 07 civic si coupe. (dont flame) i love the z's. i would like to get a tune on my car but dont know of any shops in my area. is anyone on here from the charlotte area that would know of a place to go. i dont exactly know what a tune is. what do they do and what improvements will i gain. im a newbie to tuning so any advice would help a lot.
thanks