B&W (RVK3300) Companion 20K Fifth Wheel Hitch For Ford Superduty Pickup With Factory OEM Under-Bed Rails
$147-Flip Over Gooseneck Hitch Accessories | FL2 King Pin for FlipOver Hitch to hook to a inverted 5th wheel hitch, this is NOT a double kingpin. Hitches & Couplers
OE Series Puck Mounting System — "How it Works" | Fifth Wheel Hitches by PullRite