it is really simple man. which one is it the secondary or the first? if its the first the easiest what is to remove the header. just follow the wire to the plug and unplug the remove the header the bam just take a wrench and do it to it. some times you might need to soak it in wd-40 and put the header in a vice and give it hell. then just put the new one in it and tighten down and plug it back in its really simple. just look. or you could buy a haynes manual.