Well with the amount of aftermarket gauges on the market I'm wondering which ones do I actually NEED? Oil, Volt, A/F, EGT, Boost, etc... Which gauges do you guys think are important and to what type of car? I mean please make 2-3 list: Gauges for a N/A car, FI car (turbo or SC), mabye one for cars on the bottle? What about a list of gauges for a car that is stock?