You don't even need a turbo...Cosworth has built N/a four cylinder engines that have hit 400-500hp!
Turbo is just a better idea. rarrreeely will u see a built honda, subaru, etc with no power adder.
Build it solid, then turbo that **** :P
plus who doesnt like BOOST!
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2002 Acura Rsx Type S - K20A2