Just got a 2002 OZ looking to do a tune-up any suggestions on up grades instead of OEM parts? It already has a cold air intake and will soon have header and cat back. Never built a 4 banger before so need some help.

 

i've had my car for a while and everyone keeps telling me to just "not worry about puttin a lot of money into it cuz ya wont get the same amount of performance ur looking for so might as well get a different car" but i've done lil by lil to my car cold air, headers, exhaust and tahts prolly bout all im gunna do bec i dont wanna waste the money tryin to turbo it when i already know i want to get another car to work on also... not sure if it helps but just sharein some info i got..