Not to be rude, but I think you really need to take a step back and slow down. Read the stickies and you'll see a lot of the performance mods here mostly pertain to gt's, ie the xr4ti ecu, vam (aka air intake). There are differences between a lx and a gt.There isn't really much for bolt on or swap for a lx. Yes, the gt header is an option. Most likely, if you want an air intake system, you'll have to fab one up.