so i was looking at the site for an oem replacement clutch but i found 2 and i dont know which one i would buy.

this one (http://ngamotorsports.com/exedy_clutch/exedy_oem_replacement_clutch_kit/gmk1016/i-149385.aspx)

or this one. (http://ngamotorsports.com/exedy_clutch/exedy_oem_replacement_clutch_kit/gmk1010/i-126579.aspx)

they are both two different sizes. which size should i get?

You need this one:

http://ngamotorsports.com/exedy_clutch/exedy_oem_replacement_clutch_kit/gmk1010/i-126579.aspx

The other one is for the 2.0L Supercharged engine...

Also keep in mind these are OEM replacements, meaning they are the same quality as stock...

yeah i know. my clutch started slipping bout 400 miles ago and i decided it might be time for a new one so i dont get stuck on the side of the road. will i need to get my flywheel resurfaced too?

Yes you will need it re surfaced (if possible) or you will have to get a new one....