I know there are air dams that you can put on your Z that don't require a front bumper, but what if I want one, like this site's red car, that seems to need one. I am not fond of the big bulky ones that look like big blocks of fiberglass attached to the front, but how do I make the necessary adjustments since my bumper's destroyed.

Well, how much money do you intend to spend?

If you don't want to replace the bumper with an air dam, you will have to replace the bumper. I bought one on Ebay a while back... Don't remember what I spent on it... Seems like it was around $200 but I could be wrong.

Or if you want to go high dollar:

http://www.blackdragonauto.com/icatalog/z/0024.html

Alternately MSA makes a fiberglass bumper:

http://www.zcarparts.com/store/merchant.mvc?Screen=PROD&Product_Code=50-1750

Or else get your existing bumper repaired?

I am sure others have ideas...