My Allure had factory-installed Koni FSD's which, as Brett noted, are not adjustable. The FSD's are not stout enough for the front axle weight on our coaches. I replaced the FSD's with Koni's SP3 which is their strongest adjustable shock. I adjusted them to the max firm setting and backed off one notch before installing. My coach no longer bounces or bottoms out.
I understand Road Kings are really top notch but I am satisfied with the SP3's.
2019 Grand Design Solitude 384GK 5th wheel. Glen Allen, VA