Originally Posted by Methodical4u

definitely! Learn about each mod. We'll start here.

1.Cat back exhaust or CBE... it will give you from 5 whp all the way to about 20 whp
2.High flow cats or HFC .... your stock cats or catalytic converters are extremely restrictive and so changing them will yield pretty big power gains.
3.Test pipes or TP are simply just a tube with no cat, they have higher gain than HFC's but are illegal to have.
4. Cold air intakes or CAI are long tubes that are outside of the engine area, they suck in cold air from outside and so far have had the highest hp gains.
5. Short ram intakes or SRI are intakes that are less restrictive as well, BUT the engine bay gets very hot and hot air equals less horsepower and since these intakes are kept inside the engine bay they are less effective, which is why many go with the CAI's instead.
6. Pulleys. Pulleys are all of the little things in the front of the engine that run multiple things at once through a belt, the aftermarket pulleys size are adjusted to add more throttle response.

These are the most common mods for bigger power, but as said already... you aren't going to gain massive amounts of power unless you add a supercharger or turbocharger... which I do NOT recommend... good way to hurt yourself.