I have a 2001 ZX3, Zetec 2.0 with an ATX & basic bolt-ons...I don’t do any racing, but live in an area full of two lane roads & highways with a lot of retiree drivers & semi’s & would really like some performance upgrades to be able to pass comfortably & safely. IMO a Nitrous set-up is probably the less costly & most efficient upgrade, because it’s there only when I need it. Anyone have a different solution or opinion?