Scoops, humps, bumps, inlets, vents, etc. If it's not OEM and native to that car it looks awful each and every single time. There is not a mod that is universally more FAIL than the hood. Yes I know some swaps and setups mean that you need a cowl hood. I get it. Still looks like total **** to me though. The example I see the most often that turns me off is fox body Mustangs with cowl hoods. Ewwwww total fail EVERY TIME. ZERO EXCEPTIONS.