First I totally read the sticky on where to begin modding a grand prix. And I plan on doing basically the first things suggested. I'm doing everything in the zzp stage 2 kit. That's not really where I had issues. The kit comes with a new downpipe. Now from there should I get that power log manifold or just a full header? Also I wanted to get cams for my car. Can I get cams (along with the valves and other things etc) to accompany the stage 2 kit mods or did I need other stuff? Then I wanted to get an electric water pump too. Would I need any tuning or anything like that with an electric water pump? And if I do the cams, stage two kit, electric water pump would I need to upgrade the intercooler too?