What rack are you referring to? The only things you have to remove are the starter, front driveshaft, and cross member brace. Other stuff like the battery and strut bar don't have to be removed but it makes the header bolts easier to get to. It also says to jack up the left side of the motor so the header will slide in place. I didn't have to do this with my Kooks but it was a little tricky to wiggle it up through the tiny slot.