Ultra Racing 23mm Rear Stabilizer Bar

[Loren]

What the Evo uses for a rear bar is completely and totally irrelevant, my friend.

It has a completely different suspension design, different weight distribution, different spring rates, etc.

A "good" rear swaybar for a typically set up Miata is about 14mm, does that make it right for a Yaris? No. A Miata is a lightweight, well-balanced RWD car with independent rear suspension.

A "good" rear swaybar for a Saturn S-series is 16 or 17mm, does that make it right for a Yaris? No. A Saturn S-Series is a FWD car, but it has an independent rear suspension, and unlike the Yaris, it uses a real swaybar (not a torsion beam axle reinforcement like the Yaris).

I could go on... but, you get the point. I hope. If you're going to make an analogy between a Yaris suspension and another car, the other car needs to be about the same weight as the yaris, have the same drivetrain layout, and a similar suspension design.

Not picking on you, Ryu... but spend more time learning about your suspension and how it works and less time studying parts catalogs. Then you might come to some meaningful conclusions.