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mokinbird87 why are you in need of a stiffer setup? Just because one prefers stiffer doesn't mean it works for others.
The tires you will run makes a bigger difference for "normal" driving, to be honest. If I gave someone rides with my previous setup (street - Toyo T1 Sport / track - Falken RT615K) vs now (street - Falken FK453 / track - Hanhook RS3), one would swear I changed my suspension setup. Sidewall stiffness makes a huge difference in ride quality.
-alex