How can I upgrade my jazz?
 

Hey guys, I have a standard L13A1 setup with the CVT, it has about 83 bhp and it's pretty damn slow.. I have replaced my rims to a lighter version, I installed 4 Toyo T1R 185/55/15 tires, the air filter was replaced by an open air filter by "Simota" and I installed a Remus free flow exhaust.
is there anything else I can do in order to upgrade power output?
what about handling? what do you suggest?
thank you!