get a torque app if you got a droid phone. the app is 5 bucks, the blue tooth obd2 port thing is like 12 bucks shipped. works damn good for checking KR. as well as all the other live data it can read.

the plugs, just get al 104's. shift kit is always nice to have.

its nice to see how much KR you have stock, then check again after the header install. should be zero after headers.