I wanted to get your opinions on weather the Stillen Sway Bars are any better than the stock and if they would fit on the roadster.

 

Like all aftermarket sway bars they are stiffer then stock and most are adjustable (stock isn't). So whether they are better depends what you expect from your car and how you are going to drive it. For 90% of owners the stocker is fine.

Yes, they'll fit the roadster. Suspension is the same as the coupe.

 

I was trying to figure out which brand of sway bars would actually fit with the roadster because some companys don't recommend their sway bars to be used on the roadster.

 

As the first sedan owner to install aftermarket sway's, I ran into the same thing when I first started calling around. However, in the end simple research on my part showed that all RWD FM* platform cars all use the same sway bars. Not surprising that the bar makers might be sticking to the same story or have not lifted a finger to make certain on their own that this is factually true, which it is.

*FM platform meaning the platform the underpins all 350Z' and G35's. The AWD G35X sedan and all Infiniti FX SUV variation's use a different front suspension and are excluded from this discussion as they use a different front sway bar design.