After seeing the picture above, it would appear that although the bar is bent like a swaybar, in actuality, it's a rear beam brace. I referenced the ST rules, but if you check back to your Street rule set 13.7, it has similar wording of 14.7 in the ST rule set. Doug specifically mentioned the RB and CS bars in his reply classifying a "torsion bar" as a sway bar. I'll certainly forward him the picture of theEibach bar for his thoughts. Any idea if/when this is available in the states? If its not available here, I'm not sure if it's legal anyway. As for not needed a rear sway bar (torsion bar), maybe the ST is a completely different animal, but in autox, rotation is everything. Lapp racing has a road racing shim to get more camber if you are interested, or let me know where you are located, and I'd be more than happy to swap out your rear beam for mine.