The Hellwig 7709 rear sway bar is thicker than the standard bar, and as I understand it the factory bar (if fitted) is hollow, this one is solid. The weight difference is large so this would stand to reason.
The bar fits extremely easily, and has made a big difference - the rear seems a lot more stable when changing direction, and the shimmy that was present between 55 and 70mph is now gone, although it may be reappearing at 80+ (needs further testing lol)
The bar uses the standard factory end links, would be nice to have these included in the kit, but they are actually supplied with the Belltech lowering kit I used so not much of an issue for me. For vehicles without a standard fitment sway bar, end links are available either from Hellwig or standard OEM links can be used.
Fitting time - 20min.