5th Wheel Pin Box - Upgraded Pin Box

Flex Air drastically reduces chucking, absorbs road shock, and minimizes bounce. The internal air bag and built-in strut work with the rubberized pivoting head to achieve a dramatically smoother ride. Replaces Lippert 1621 pin boxes.

Flex Air drastically reduces chucking, absorbs road shock, and minimizes bounce. The internal air bag and built-in strut work with the rubberized pivoting head to achieve a dramatically smoother ride. Replaces Lippert Rhino pin boxes.

Flex Air drastically reduces chucking, absorbs road shock, and minimizes bounce. The internal air bag and built-in strut work with the rubberized pivoting head to achieve a dramatically smoother ride. Replaces Lippert 1621 pin boxes.

Tired of your trailer tossing you around? Curt's Helux pin box smooths things out with a tough coil spring that beats air bags and torsion setups. It's maintenance-free, easy to use, and won't put your RV's frame warranty at risk.

Tired of your trailer tossing you around? Curt's Helux pin box smooths things out with a tough coil spring that beats air bags and torsion setups. It's maintenance-free, easy to use, and won't put your RV's frame warranty at risk.

This Rota-Flex pin box has a pivoting head with a built-in rubber compound that works to reduce chucking and absorb road shock, resulting in a smoother ride and less wear and tear on your trailer. Replaces Lippert 1621 or 1621HD pin boxes.

Tired of your trailer tossing you around? Curt's Helux pin box smooths things out with a tough coil spring that beats air bags and torsion setups. It's maintenance-free, easy to use, and won't put your RV's frame warranty at risk.

Tired of your trailer tossing you around? Curt's Helux pin box smooths things out with a tough coil spring that beats air bags and torsion setups. It's maintenance-free, easy to use, and won't put your RV's frame warranty at risk.

Tired of your trailer tossing you around? Curt's Helux pin box smooths things out with a tough coil spring that beats air bags and torsion setups. It's maintenance-free, easy to use, and won't put your RV's frame warranty at risk.

Tired of your trailer tossing you around? Curt's Helux pin box smooths things out with a tough coil spring that beats air bags and torsion setups. It's maintenance-free, easy to use, and won't put your RV's frame warranty at risk.

This Rota-Flex pin box has a pivoting head with a built-in rubber compound that works to reduce chucking and absorb road shock, resulting in a smoother ride and less wear and tear on your trailer. Replaces Lippert 1116 pin boxes.

This Rota-Flex pin box has a pivoting head with a built-in rubber compound that works to reduce chucking and absorb road shock, resulting in a smoother ride and less wear and tear on your trailer. Replaces Lippert 1621 pin boxes.

Experience smooth, stable towing with your fifth-wheel trailer by replacing your ordinary pin box with an air-ride-equipped model. The scissoring action of the coupler allows the interior air bag to absorb road shock so that you won't feel it.

Tired of your trailer tossing you around? Curt's Helux pin box smooths things out with a tough coil spring that beats air bags and torsion setups. It's maintenance-free, easy to use, and won't put your RV's frame warranty at risk.