I know I COULD search, but that would probably entail a large amount of time to actually find what I want and someone out there can probably answer my Q quickly. Can I swap out the S5 N/A sway bars(is it a bolt on IOW) with S4 T2 sway bars AND see an improvement? I would like to get a S5 GTU body, use my brakes and rotors, and then swap out the drivetrain and use my S4 TII engine.

 

Just measure the bar diameter.

I'm not sure, but I thought the GTU used the same heavy bar as the turbo.
Maybe it was the GTUs?

 

they are interchangeable. sorry for wasting space :P

 

Fronts, YES. Rears, NO.
The dimensions should be identical, unless you're swapping from a base model. An "S5 GTU" is a base model.



-Ted

 

the sway bar size is the same between a S5 non turbo and a S4 turbo.

The only advantage to the swap is getting rid of the lame S5 plastic end links.