I know this is an old post, but, I researched a little and see a few VX pics on this site from different members have different Isuzu OEM center caps on their stock 18"s. I'm seeing one type that is in fact smaller and just mounted to the wheel itself from behind as SGT.BATGUANO said, not through the lug nuts...like this:

http://www.vehicross.info/gallery/sh...php?photo=6848

While others have caps that are mounted through the wheel lug nuts and are wider....like this:

http://www.vehicross.info/forums/att...tachmentid=308

Was this an Isuzu change in design or something else??
hmmm........?

Quote Originally Posted by SGT.BATGUANO
The factory center caps are attached with 3 bolts from the inside of the wheel and the cap extends to the center of the bolt circle. The caps on dg's wheels are held on by the lugnuts, if I'm not mistaken and the circumference extends outside the bolt circle, like some older isuzu caps.