DOT3 for the SC430.

Whether or not those claims from the manufacturers are true and biased, my brake pedal did feel firmer after bleeding with synthetic fluid and ss lines install.
I stated it as a package since it could be just one of those things I did made it feel firmer.
That is a fact based on my direct experience in my own sc430, not just my opinion.

You are free to express your opinions, yet nobody here is professional in that field to prove or disprove their claims.

 

I haven't had personal experience but have read in multiple posts and forums that installing SS brake lines will result in better feel and modulation ability on the brakes.