Don't expect it to feel like a sports car afterwords. It may not feel different at all. The only thing you could do to an engine that small to make respectable power is forced induction (nitrous, turbo, supercharger). Nitrous is the cheapest way, but it has its downsides. Turbos are complicated and expensive, and your engine may not be able to handle much anyways (I don't know). It'd be easiest to just buy a faster car.
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