Use that money for the suspension or rims and tiresBuying an intake and exhaust will only give you about 5-7 extra horespower. That is not enough to make a noticable difference.Plus, you would be best off swaping engines later down the road. Putting a B-series engine into your CRX will really make it quick. You dont want to buy an intake and exhaust that won't be compatable with your swapped engine.Invest that $500 into the suspension before anything else.