Strut-Tower Bar

I used to think that all impala's had strut-tower bars, but I just realized that the 05's and the new 06's don't. Has anybody driven both an impala with a strut-tower brace and one without it? Does there appear to be any different in structural rigidity?

you are correct, some have gthem some dont. the STB does actually work tho, you are able to notice a difference in how it handles. if you want one that bad, you can buy brackets from ZZP that bolt up to the strut bolt holes, instead of drilling new holes.

http://www.zzperformance.com/grand_prix/products1.php?id=139