Are there any after market exhaust systems or cold air intakes for my car? And, would it be worth it to buy these things if they are available...on a four cylinder...

 

CAI's I've seen haven't given the promised HP gains....a K&N air filter is much cheaper and will give you almost as much of a power gain. The other mod you need is a custom/tuned exhaust for your car.

Intake/exhaust mods are the most cost efficient power add-ons for your car and have been for decades. They give you the most bang for the buck....

 

I have a CAI and catback on my car, and im very happy with both, i bought one of the lower priced CAIs, off of ebay, and bought a K&N filter to go on it, and ive not had a single problem.