Is it really worth it. If I do it I will do manifolds, uppipes collector and the turbo. It would be nice if it helped spool up does it really make much of a difference. But the main thing that I am wanting is the reduction in underhood temps. If I pop the hood after driving I can't touch nothing for aat least a half hour with it burning, well not burning, but very uncomfortable you know what I mean. And do they just coat the outsides of everything or do they do everything inside and out.