Dont worry about cheap mods. If you want to make your car look good, then doing things cheaply isnt going to get you a nice looking car.
Also exhuast isnt cheap, unless you get a 20 dollar muffler from ebay (these are a waste of money) and these are going to do nothing for performance. if you want to do exhuast right then your looking at spending upwards of $200, same with intakes you dont want to buy a cheap one from ebay, i would go with an AEM intake or even one from
www.induction-dynamics.com