has anyone bought autodynamic strut bars? they cost around 40 bucks. they are so cheap compared to stillen's strut which cost 200 bucks. are the autodynamics a good investment? do they work?

 

Stillen is definitely worth the extra $$. Just keep saving.

 

does it matter if the strut bars are O shaped? or C shaped? and is a strut bar just a strut bar? or do the more expensive ones have a drastic improvement? thanks in advance

 

My feeling is that strut bars are strut bars, as long as they are thick enough and rigid enough, they all do the same thing. I paid $47 for my FSTB and it is the thickest and most rigid bar I've ever seen on a Maxima. I think I got it from www.procarparts.com, something like that.