dont knwo if its been ansured but i tryed a search and i got aot of stuff on the tC but not hte xA anyways. what performance option gives me themost midrange power increase?

 

from what i've heard is the 4-2-1 header

 

get a pulley zpi or perrin...i would go zpi, i think.....or you could get a short ram intake,which is supposed to be more low end power. what hornet said, and.... thats about it, as far as which is better, we'll never know......but i think the pulley is.