Tuning my 04' tiburon tuscani please help

I just bought a 2004 hyundai tiburon tuscani 2.7 elisa edition and i am looking to tune it up give it more power and avoid doing damage. im already working on the looks but im not much into making a ricer, i want whats on the inside to match whats on the outside. Any advice to give me more power and links to getting these parts.  

Here's a few sites courtesy of Wiki to get you started. If you're looking to keep it NA, hyundaiperformance has a section just for tuning NA. Hope this helps.
http://www.gkmania.com/
http://www.hyundaiperformance.com/
http://www.hyundaicoupeclub.co.uk/
http://www.newtiburon.com/
http://www.cardomain.com/MakeModel/Hyundai/Tiburon
http://www.hyundaicoupe.info/
http://forums.hyundaicoupe.info/
http://www.rdtiburon.com/  

Thank you man that should help me out a lot