For the two years I've been researching my suspension setup, I was planning on going Hotchkis for sure. Nothing changed my mind until three days ago when I realized something. I e-mailed and confirmed with one of Hotchkis's engineer that their 29 mm hollow sway bar is really 44% stiffer than stock. By using an equation to compare stiffness, I found that their 29mm hollow sway bar is actually equivalent to a 26.292mm solid sway bar in stiffness. So I thought to myself, "Are there any solid front sway bars larger than 26.292mm?" I searched and found one. A solid 27mm front sway bar made by Progress. Using the equation again, I calculated and confirmed with Progress 
that their 27mm solid sway bar was 60% stiffer than stock. That means that Progress's 27mm sway bar is around 26% stiffer than Hotchkis's 29mm sway bar! And even though it weighs around 16 pounds, the greater torsional stiffness makes up for the weight.
that their 27mm solid sway bar was 60% stiffer than stock. That means that Progress's 27mm sway bar is around 26% stiffer than Hotchkis's 29mm sway bar! And even though it weighs around 16 pounds, the greater torsional stiffness makes up for the weight._____PROGRESS___VS.___HOTCHKIS
Front: 27mm +60% ________29mm +44%
Rear: 19mm +56% _______* 19mm +56%
F-R #1: +307% ____________*267%
F-R #2: 17mm +536% _______17mm +472%
Weight: 16lbs ____________.7.94lbs
ACR SRT-4: 22mm (10.73lbs)/ 19mm = 80%
F-R: 80%
Non- ACR SRT-4: 24mm (12.85lbs)/ 17mm = 297%
F-R: 297%
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