Luquire

OK guys I am changing the rear valve cover gasket (one closest to firewall) on my 2001 Maxima and have to take the intake manifold off. She is leaking oil. I have a 160k miles on her. I am thinking this would be a good time for spark plugs, maybe fix the vias, clean the intake manifold and TB, and maybe replace the knock sensor. I am also thinking of putting headers on even though I have a y-pipe. I am going to do this in 2 weekends from now with a friend (we scheduled a play date with our wives consent). So please add or subtract from the list.