What's a little confusing about this list, is the fact that the stiffness of the bar should approximately be proportional to the diameter^4 (solid bar).
So, for instance, a 20 mm sway bar should be 52% stiffer than a 18 mm bar (since 20^4/18^4=1.52). (And not 174% stiffer or something).

The length of the arms on the bar has a profound effect on stiffness though. This is why a 3-hole sway bar can vary from 20% to 200% stiffer than stock.

I know, but some only have one hole and at least appear to have a similar geometry.

I just took information from the Internet and from some brand directly, I can't say all info are validated and I don't have any way to do this but this is a good start to guys who search for sways...

Anybody that's using the oem wrx bar have problems with it shifting side to side? The collars are a little bit closer together and Im having it walk to one side and cause a ruckus.

Nope. I run the Strano front and the WRX rear with whiteline bushings and the car is perfectly neutral and neither bar walks or makes any noise.

Can you peak at your rear and see if their is room between the collars and the bushings....also which direction the hump is pointing

Does anyone know the % stiffness compared to stock for the TRD sways? I don't see it in this forum anywhere or in the links to it on page 1. Thanks

Now if you were to be ever so kind as to include prices for each sway bar as well? It'll help people who are looking for sway bars quickly compare different ones on paper.

@Mikepage ...please add the Beatrush sway bars your list

Beatrush 19mm Solid Front Sway Bar

Beatrush 15mm Solid Adjustable Sway Bar

**Both sway bars will allow you to maintain OEM endlinks.

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