TRD Stage 1 - Is your engine pretty much stock besides the cam? I have an aftermarket foam filter (in the original air cleaner box) and will probably put a header and 2.25 exhasut system, otherwise mine will remain stock. I've heard stories about messing up the injection, computer, idle, knock sensor etc. and don't want to go there.
Yes it is stock except for the 2 inch straight exhaust into a 2 chamber flow. FOR NOW
