Lug pattern?
 

Whats the lug bolt pattern on our mk3's????

5X114.3

Not sure what the stock offset is (if you need it... I believe it's between +38 and +43)

and if you need offset ideas for wider wheels, you can always plug your car into tirerack.com and see what it recommends for you. their "detailed info" page usually has offset (and weight, which is also nice) on it.

Is it the same pattern as the mustangs and eclipse's?

its the same as the mustangs, dunno about eclipses

ya the mustang and the 95-99 eclipse is the same i know because my friend had cobra wheels on his gsx lol what a retard.