The EXECUTIVE Fifth Wheel (Torsion-Flex) King Pin Box

The EXECUTIVE Fifth Wheel King Pin Box is a Torsion-Flex replacement pin box that isolates the truck bed from trailer shock using rubber torsion arms instead of a rigid connection. Customers report up to 90% smoother towing compared to a standard fixed pin box, along with better steering control. It's built for LCI Rhino Box and Lippert 1621, 1621 HD, 1116, and 1716 frames, and is rated across three GVWR tiers ranging from 7,275 to 30,000 pounds depending on the model selected.

Customers report up to 90% smoother towing with the EXECUTIVE King Pin Box compared to a standard rigid pin box. The Torsion-Flex design uses rubber torsion arms to isolate the truck bed from trailer shock, which reduces the jolt transferred through the frame over rough roads. Reported secondary benefits include improved fuel mileage, less tire wear, and reduced wear on other towing components, though results vary by trailer weight, road conditions, and driving style.

The EXECUTIVE King Pin Box fits the LCI Rhino Box frame directly, and Lippert 1621 and 1621 HD frames without modification. It also fits Lippert 1116 and 1716 frames, but those two require add-on shim plates sold separately. Confirm your trailer's frame model before ordering, since fitment differs by frame, and the shim plate requirement specifically applies to the Lippert 1116 and 1716 models.

The EXECUTIVE King Pin Box is available across three GVWR tiers: 7,275 to 16,360 pounds with a 4.5K tongue weight rating, 16,365 to 25,450 pounds with a 6.5K tongue weight rating, and 25,460 to 30,000 pounds with an 8.5K tongue weight rating. Choose the model that matches your trailer's actual GVWR, since towing capacity is limited by the lowest-rated component in the full setup, not just the pin box itself.

Only if your trailer uses a Lippert 1116 or 1716 frame. Those two frame models require add-on shim plates, sold separately, to fit the EXECUTIVE King Pin Box correctly. If your trailer uses an LCI Rhino Box, Lippert 1621, or Lippert 1621 HD frame, no shim plates are needed. Confirm your frame model before ordering so you know whether to add shim plates to your order.

The EXECUTIVE King Pin Box carries a 5 year warranty on rubber components and a limited lifetime warranty on all remaining components. An optional TORSION-FLEX Lifetime Warranty upgrade is also available at checkout, which extends coverage on the rubber components and connecting hardware for as long as you own the hitch. GEN-Y also backs the product with a satisfaction guarantee.

The average break-in period for the EXECUTIVE King Pin Box is 1,000 miles. During this period, the rubber torsion components settle into normal operating tension, so ride quality typically continues to improve over the first several trips. GEN-Y recommends periodically re-checking bolt torque during this period, since factory bolts commonly need a second tightening after initial use.

The base EXECUTIVE King Pin Box (part number GH-8051) weighs 154 pounds. Weight can vary by GVWR tier and frame configuration, since higher-capacity models and added components like shim plates or a capture plate increase overall weight. The unit is fabricated from heavy duty steel and finished with a durable powder coat for corrosion resistance.

Yes. The EXECUTIVE King Pin Box is manufactured in the United States. GEN-Y fabricates it from heavy duty steel, precision mills and drills the components, and engineers the design using SOLIDWORKS software. It's tested to exceed SAE J2638 weight testing requirements and is backed by a 5 year warranty on rubber components and a limited lifetime warranty on all remaining components.

The EXECUTIVE King Pin Box itself includes the Torsion-Flex pin box unit matched to your selected GVWR tier and frame model. Safety chains and the bolt kit are sold separately. Optional add-ons include shim plates for Lippert 1116 and 1716 frames, a fifth wheel capture plate, a bolt installation kit to upgrade factory bolts, and an extended TORSION-FLEX Lifetime Warranty. Review your frame's specific requirements before checkout to confirm which add-ons apply to your setup.