Can a Reese Goosebox Pin Box Be Used On a 2024 Keystone Cougar 355FBS
Updated 10/22/2025 | Published 04/05/2025
Question:
Hi there, I own a Keystone 2024 fifth-wheel Cougar 355FBS. I want to change the pin box to a Reese gooseneck gen-3. Do you think this would work? Thanks
asked by: Chris H
(click to enlarge)
Expert Reply:
Hey Chris, yes a Reese Goosebox could absolutely work with your 2024 Keystone Cougar. You'd just have to let me know what pin box you have currently and I'd be happy to get a replacement pin box over to you.
The most common pin box is a Lippert 1621/1621HD, so in that case you'd want to use the Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter # RP94716.
Let me know in the comments what you have, or if you don't know, send me a picture of your label and I can do some digging around!
Product Page this Question was Asked From
Safety Chain with 2 Hooks for Gen-Y 5th Wheel to Gooseneck Pin Box - 84" Long - 26,000 lbs
- Trailer Safety Chains
- 3/8 Inch Diameter
- Gooseneck Trailer
- Standard Trailer
- 84 Inch Long
- 26000 lbs
- Single Chain
- Gen-Y Hitch
more information >
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Jon G.
10/22/2025
Hey Chris, did you find out which pin box your Cougar has so you could match it with the right Reese Goosebox? Your update could make it easier for others looking to switch to a gooseneck setup too.