Is there a Curt Helux Replacement Pin Box for the Lippert 1621 Bolt Pattern?

Updated 05/27/2025 | Published 01/21/2025

Products Featured in This Question

Curt Helux Shock-Absorbing 5th Wheel Pin Box - Lippert Rhino - 24K GTW - 4,850 lbs TW

(23)

$1615.95

Curt Flex Air 5th Wheel Pin Box - Lippert 1621 - 21,000 lbs

(199)

$1830.34

Question:

Hi I have a 621lippert pin box on 2018 337rls grand Design 5th wheel and would like to up grade to a curt Helux shock-Absorbing pin box if I can which one well fit my 5th wheel

asked by: Jeff O

Expert Reply:

Hey Jeff! Thanks for the information! As of 1/21/2025 the Curt Helux Pin Boxes like item # C63RJ are only designed to fit the Lippert Rhino pin box. There is no word on when or if Curt plans on producing these to fit other pin boxes.

The closest most comparable option I have is the Curt Flex Air 5th Wheel Pin Box item # LC369535. It's a similar design and the cost is also comparable. The main difference is the adjustable air bag over the coil-spring.

If you're wanting to wait to see if Curt releases a Helux for the Lippert 1621 go ahead and keep this link and check back around the beginning of summer. Feel free to email me directly or comment below.

expert reply by: Jerred H