stop right there.

SUNROOF = CIVIC EX

you dont have a dx my man. you have an ex. and you should be damn proud too. the d15 in the dx/lx is nuthin. nobody wants it, nobody likes it. its reliable as hell, but its weak.

the d16 on the other hand is a good engine (not that the d15 isnt or anything, its just better). you have a 125 hp, 106 ft/lbs of torque, 1.6 L, VTEC motor. a lot of people mod this engine for more power. no one mods the d15.

also, in case you didnt know (and it sounds like you do you just have it mixed up a little), the EX is the top of the line Civic (minus the Si of course), not the DX. LX/DX are both lower class than the EX. also, if you have a tachometer (rpms) you certaintly dont have a DX. only an EX and LX came with a TACH. since you have a sunroof, it will be an EX cuz this is the only model that came with it (minus, of course, the Si).