besides the zex kit I have on it is there anything I can do for some good boost? If I had $4500 I would go t-66 costom but I don't. any other ideas for this red headed basterd step child engine?

 

i have an 89 Si and i added DC headerr, straight piped the car with 1/2" bigger pipe and moved the battery to the trunk and droped in my home made intake(2 piece) cold air. and added MSD spark plug wires and put new spark plugs...i dyno the headers and intake and pipe...and i gained about 13 Hp and 14 torque. if u have more questions just ask