i've had my si for a few months now and it's still stock. i need some suggestions on a good first upgrade for my car thats cheap and easy.

 

do you want more power of better handling? That is the key question, if it is power and you don't live in a wet and rainy area I would go with either the injen or AEM CAI. You could then do a IMG to lower your intake temps and then get the Hondata reflash. If you want to better handling, then get a progress Sway bar as it is the best bang for the buck as far as handling goes