Oooh now there's a question thats never been asked on here before!
The general consencus for OBDII cars (yours) is that you need to "shark" it and probably change the air intake too, add a performance exhaust that you can fit your head in and away you go!
Try a search on chipping/sharking...there is tonnes of stuff in the forum
Hope this helps
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Thought for the day: "d'uh"