The plugs are angled in the head, so that you can remove them w/o taking apart the intake manifold--all you need is an extension(s) that is/are long enough. The wires are fragile, so you will want to replace them at the same time--not very often does someone just do the plugs and not end up w/ a bad wire misfire. Put some anti-sieze on the plug threads and some dielectric grease in the plug boots--you'll thank yourself for this next time.