^^^ YEP! Do some research and save!!! The best way to start modding in my opinion is suspension. That is something you can feel and see the results from immediately. Shocks, and springs or coilovers, then some sway bars. Then if you really want to feel some gains and don't want to go nitrous or boost you might want to save your money and strongly consider cams. Every other bolt on mod will give such little gains it won't be all that noticeable. Lastly a nice sound mod is a cold air intake. I have an AEM and really love the added throaty sound it gives the car when you punch it. It also looks a lot better under the hood then the stock. Good luck.
*Retired the is3*
*2008 BMW 535i*