most cowl hoods are non fuctional as in they are just humps, no space for air to leave. you can purchase hoods that let heat out, and are more sleek looking.
and the best way to combat heat is an oil cooler the life blood of an engine, but stock motor = stock heating.
your ccowl hood isn't gonna give you more hp, if it does it's so minor you can't measure it.
either way. don't buy a cowl hood, you know it and i know it. get some suspension, atleast then you feel the difference.