KYB’s are not adjustable. And no. KYB’s are hot garbage.
I say that after running them for 10’s of thousands of miles on my Challenger before upgrading to RCD Bilstein shocks. It was like driving a different car, a night and day kind of improvement with the only change being the KYB’s going in the trash where they belong.
KYB’s are a kind of band aid for guys that want to keep the original torsion bars. The combination of a really soft torsion bar, with a really stiff shock, results in a ride that feels somewhat “normal” in fairly basic driving conditions. Handling performance remains trash, because neither component is doing the job it should be doing.
But paired with a torsion bar of an appropriate size for a modern radial tire, KYB’s will rattle your teeth out. And give lousy handling too.