Are there any certain dimensions I should be looking for? Or is it just a trial and error kind of thing. I'd hate to buy a kit and have it not fit.

 

BBK's have fitment diagrams which u can create and cut out of say... posterboard and then put into ur current wheel so check fitment to the mm..


each site should have layout of there kit.. but remember... diff hats.. create diff offsets do make sure the kit is for your car and its complete kit.. dont mix match calipers/rotors.

viola... ur done