I have heard that even small adjustments can make a big difference in your cars performance. Like spark plugs and even inxepensive stuff. The problem is i dont know all of the possible inxepensive things that can be done. What should i do first?

 

buy a new car. lol.

jk. change your oil as required and keep your tires properly inflated.

 

Lots of decals..they add 10hp a piece..the more outrageous the more horses..so like a spaceship along your door equates to at least 200+hp

 

i wouldent even bother with the little things yet, even IF they did add more power its nothing that would make a difference and you wont be able to feel it, i would go with changing the intake,exhust and header to get the flow or air better and then you will start to feel a little more bite and then from there it all depends on what else you want to do

 

Replacing little things will only help you. New spark plugs and wires will help you achieve higher gas milage. Clean the fuel system..........etc.