Could sombody tell me what are the strongest and stiffest sway bars on the market for a evo 9.

 

I'm highly curious as to why...

You plan on using this car in a track setup?

 

I would either go for Cusco or Hotchkis, they are tough and adjustable (rear).
BTW, I have new Cusco Front sway 21mm for sale if anyone is interested. PM me if anyone is interested. Asking only $140 shipped/paypaled.

 

I dont want the car to sway at all when im taking a corner real fast.

 

Might want to try springs or coilovers too then. But adding a stiffer front sway is going to promote understeer.

 

I actually have coilovers on my car already.