Replace Lippert 1621 HD with Curt Air Ride 5th Wheel Pin Box for Lippert 1621 HD

Updated 07/02/2021 | Published 06/29/2021

Products Featured in This Question

Curt Flex Air 5th Wheel Pin Box - Lippert 1621 - 18,000 lbs

(185)

$1649.39

Curt Air Ride 5th Wheel Pin Box - Lippert 1621 & 1621HD - 21,000 lbs

(81)

$1296.48

Question:

Trailair LC328492. I currently have a 1621HD listed at 18K installed on my 2018 Highland Ridge 350H toy hauler and want to make sure I purchase the correct component. Also, what is the difference on the long jaw and medium jaw and what do I need.

asked by: Joseph S

Expert Reply:

The Curt Flex Air 5th Wheel Pin Box - Lippert 1621, # LC328492, and other Curt Flex Air 5th Wheel Pin Boxes are designed to be direct replacements to your current pin box. The long jaw models, medium jaw descriptors you refer to simply identify the type of pin box it is designed to replace.

If you currently have the 1621 HD installed then I suggest the Curt Air Ride 5th Wheel Pin Box, # LC158778 that designed to replace Lippert 1621 and 1621HD long-jaw 5th-wheel pin boxes. The length (from outside edge of mounting plate to center of king pin) is 28-11/16".

Please note the attached product review and installation videos.

expert reply by: Michael R