What Pin Box Does The Curt Helux Pin Box C63RJ Replace?
Updated 11/03/2025 | Published 01/26/2025
Question:
Does it fit to replace a 1621 HD? If so, is it compatible with the Curt Crosswing?
asked by: Sean W
Expert Reply:
Hello Sean, thanks for reaching out. The Curt Helux Shock-Absorbing 5th Wheel Pin Box # C63RJ replaces the Lippert Rhino Box pin box, not the 1621 HD. I actually asked Curt about this 2 weeks ago and they said right now they are only doing the Helux for the Rhino Box, but they do hope to add more fits such as the 1621 a bit later.
To answer your other question, the Helux pin box can be used with the Curt CrossWing 5th wheel hitch.
Product Page this Question was Asked From
Curt Helux Shock-Absorbing 5th Wheel Pin Box - Lippert Rhino - 24K GTW - 4,850 lbs TW
- 5th Wheel Pin Box
- Upgraded Pin Box
- Absorbs Road Shock and Reduces Chucking
- 24000 lbs
- Rubber Spring Suspension
- Fixed Turret
- Lippert Rhino
- CURT
more information >
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Jesse M.
11/3/2025
Hey Sean, were you able to find a pin box that fits your 1621 HD setup? Knowing what worked could help others trying to pair their hitch with the Curt CrossWing too.