[ZX3TUNING]

when it comes to picking suspension and rim/tire setup you need to consider more than what has already been posted.

first, what are your priorities? Look? Handling? ride quality? cost? and in what order?

you can run 18s on a 3" drop just like you can run 17s or 16s or 15s with the same drop, just like you can with a 1" drop. it a matter of wheel offset, wheel width and tire size. rim size has little to do with fitment inside the fenders as if you purchase the right aspect ratio of tire, it will be the same diameter as the stock 15s/16s and tires. the problem with 18s is more that there is less tire between the rim and the road and if you live in an area where big potholes and crappy roads are common place, you increase the chances of damaging the rims and/or tires.

for suspensions...

the SVT kit is nice for a mild improvement in handling and about a 3/4"-1" drop. not the best choice for a big drop look or great handling.

a sport kit of some sort will offer you a solid handling car right out of the box. different kits offer different ride quality and bigger or lesser drops.

coilovers offer you the advantage(or disadvantage if you do not know what you are doing) of adjustability in ride height. this allows you to tailor the drop to fit the look you are after.
more expensive coilovers may offer dampening adjustment which allows you to dial in firmer or softer handling.
cheap coilovers are garbage and not even something you want to look at.

Springs are another opting for a cheap drop but most springs will eventually cause the shocks to fail. because of this i suggest doing the springs and shocks at the same time, something like a Sport kit takes care of this for you. while it may seem like more money up front, you save having to pay for the labour twice when the shocks and struts give out on you.

there is a lot more to is but that is a good starting point for you.
figure out what you want and then you can better figure out what you need. ;)


also remember to take the advice you get online with a grain of salt.
it's your car and your money, not theirs so do what you want.
also, the more research you do before you buy the better off you will be.