Getting down to the cylinder heads is a dirty task. Remove any aftermarket items, such as nitrous, blower, or strut brace, that are in the way. The upper intake is held by six bolts (two under the ID plate). Be mindful of an intake bracket at the back on some model years, and don't just start prying in a he-man fashion. Once the upper intake is off, the valve cover bolts are easily reached. Don't forget to disconnect your battery.