so i am planning on modding out my 87 190e 2.3 8v and i want to know what i should buy to economically (that means i'm cheap ) boost horsepower?

bought:
black chrome euros
kyb shock/strut assembly

ordering:
intrax lowering springs
stage 1a intake
custom exhaust (from headers to high flow cat straight to muffler)
brembo cross-drilled rotors
jet ecu calibration
nology ignition system (wires, plugs, distributer, etc...)

so what else should i throw on my wish list to "create the ultimate rice eater out of a kraut can?"