Q: If so around how much would it cost
A: It is very possible, but it would more than likely take a few thousand dollars to do so. The Preludes generate horsepower through higher compression ratios. You would basically either need to increase your compression by changing your internals, or through the use of forced induction. You could possibly also just get all the bolt on upgrades possible, like intakes, exhaust, etc., but in the long run, I think your best bet would be a basic turbo setup, either on your current engine, or (my preference), swap in the 4G63 from the GS-T and GSX models. EDIT: Good points as well, atsun1741, and thank you for mentioning that nitrous wouldn't be a smart idea for this application.