I have a 97 1.6L corolla (automatic) and its tooo slow......

so far all I've done is the following;
Weapon R intake
JVT racing headers (ebay)
Flowmaster exhaust
Magnaflow Cat. converter
So im most likely not going to be able to get more air in or out without turbo/super charger.
SO WHATS NEXT.

im looking to get performance before I do a bodykit or rims. Im thinking a performance chip but ive read hear and other places toyotas dont have many options for this.
What do you guys think is the best way to increase horsepower without breaking the bank. i dont have alot of cash but im sick of being slow ( i use to have a 91 toyota cressida with a straight 6 and it floated pretty nice

.)
SO WHERE DO I GO NOW, (with this engine), thanks
(we are all professional smarta$ses on the internet so if you dont have real advice then dont bother)