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  1. 5th Wheel Pin Box
  2. Gen-Y Hitch
  3. Lippert 1621
  4. Lippert 1621HD
  5. Upgraded Pin Box
  6. Absorbs Road Shock and Reduces Chucking
Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box - Lippert 1621 and 1621 HD - 21,000 lbs - 3.5K TW
Gen-Y Hitch

Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box - Lippert 1621 and 1621 HD - 21,000 lbs - 3.5K TW

Part Number: 325-GH-8040
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Retail:$1,643.79
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5th Wheel Pin Box
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This shock-absorbing pin box provides a smooth, safe ride while you tow your fifth-wheel trailer. The all-in-1 box has no air bags to refill or small parts to replace. 3.5K pin weight. 1-800-940-8924 to order Gen-Y Hitch 5th wheel pin box part number 325-GH-8040 or order online at etrailer.com. Free expert support on all Gen-Y Hitch products. Great prices and Fastest Shipping for Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box - Lippert 1621 and 1621 HD - 21,000 lbs - 3.5K TW. 5th Wheel Pin Box reviews from real customers.
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Gen-Y Hitch 5th Wheel Pin Box - 325-GH-8040

  • Lippert 1621
  • Lippert 1621HD
  • Upgraded Pin Box
  • Absorbs Road Shock and Reduces Chucking
  • Gen-Y Hitch
  • 21000 lbs GTW

This shock-absorbing pin box provides a smooth, safe ride while you tow your fifth-wheel trailer. The all-in-1 box has no air bags to refill or small parts to replace. 3.5K pin weight.


Features:

  • 5th-Wheel king pin box upgrades the existing pin box on your 5th-wheel trailer
    • King pin inserts into your truck's 5th-wheel hitch
  • Shock-absorbing design ensures a smooth, steady ride
    • Technology functions like a torsion axle to limit transfer of road shock from trailer to truck and vice versa
      • Reduces chucking and rough fore-and-aft motion
      • Limits bounce and jarring up-and-down motion
    • No airbags to maintain and fewer moving parts to repair or replace than with other shock-absorbing solutions
  • Heavy-duty steel construction
  • Powder coat finish resists wear and corrosion
  • Simple, bolt-on installation
    • Mounts with existing bolts
  • Made in the USA


Specs:

  • Designed to replace Lippert 1621 and 1621 HD 5th-wheel pin boxes
  • Towing capacity: 21,000 lbs
  • Pin weight capacity range: 1,500 lbs - 3,500 lbs
  • 5-Year limited warranty


Notes:

  • Average break-in period for hitch = 1,000 miles.
  • In order for the pin box's shock absorption to work correctly, make sure your pin weight is within the pin weight range.
  • Because the Gen-Y Hitch Executive is shorter than the Lippert 1621 or 1621 HD pin box, the clearance between your trailer and tow vehicle during turns might be reduced.

Calculated Tongue Weight Executive Tongue Weight Capacity Required
500-1,500 lbs 2,000 lbs
1,501-3,000 lbs 3,500 lbs
3,001-4,000 lbs 4,500 lbs
4,001-5,000 lbs 5,500 lbs
5,001-6,000 lbs 6,500 lbs
6,001-7,000 lbs 7,500 lbs
7,001-8,000 lbs 8,500 lbs

Built-In Shock Absorption for a Smooth Ride

Executive torsion

If you've ever towed a fifth-wheel trailer before, you're no stranger to road shock. Driving over uneven terrain can result in a rigid, bumpy ride. And uncomfortable fore-and-aft chucking can occur when you're starting and stopping. When all of the motions combine, the road shock can even potentially damage your truck or trailer.


This Gen-Y Hitch torsion pin box is designed to absorb road shock at the connection point to create a safe, smooth ride. This is thanks to the internal construction of the box, which is similar to that of a torsion axle.


Pivot points are built into the Gen-Y pin box. This allows for movement between the box, which attaches to your trailer, and the king pin, which connects to the fifth-wheel hitch in your truck bed. When your trailer bounces or jerks, the king pin will move accordingly.


torsion diagram

Built into the Gen-Y pin box are tubes with inner bars that are surrounded by rubber cords. As the king pin moves, these inner bars twist inside of the tubes, attempting to follow the pin's motion. But the rubber cords prevent the bars from twisting too far. And as each bar turns, these cords compress to absorb the rough shock. This means that any shock experienced by your truck can be absorbed before it reaches your trailer, and the shock experienced by your trailer won't get transferred to your truck.



GH-8040 GenY Hitch Executive Fifth-Wheel King Pin Box with Torsion Shock Absorption - LCI 1621/1621 HD - 21K





Customer Satisfaction Score:


Customer Reviews

Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box - Lippert 1621 and 1621 HD - 21,000 lbs - 3.5K TW - 325-GH-8040

Average Customer Rating:  4.7 out of 5 stars   (43 Customer Reviews)

This shock-absorbing pin box provides a smooth, safe ride while you tow your fifth-wheel trailer. The all-in-1 box has no air bags to refill or small parts to replace. 3.5K pin weight.

by:

I provided the specs on my 5th wheel (Grand Design Momentum 351 MS) when ordering the pinbox. I had the Gen-Y pinbox mounted and used it for about 5-months to find later that the pinbox was not the proper pinbox for my 5th wheel while having Independent Suspension installed. I replaced the Gen-Y with a MoRryde pinbox while at MoRrdye. Not a good experience and a loss of funds.



by:

Thank You for your interest in my experience with the Gen-Y King PIN Hitch I purchased last year. I love the Gen-Y KP Hitch. The torsion mechanism has significantly smoothed out the ride compared to the standard Lippert King KP Hitch that came standard on my Grand Design Reflection 340RDS 5th Wheel. I also like that the Gen-Y KP Hitch is 4" shorter than the Lippert KP Hitch as I get a little more turning radius with my short bed Ram. Also, the contour of the Gen-Y KP Hitch allows a little more clearance over the top of my Gator Tonneau Cover Rails v.s. the Lippert KP Hitch.

Now for the "not so good" news about my purchase experience. The packaging of the Gen-Y Hitch was way below the quality standard I would expect from E-trailer. Please see attached file.

I'm sorry I did not send you this information regarding the poor packaging and subsequent minor damage to the Gen-Y KP Hitch which I was able to correct upon install of the Hitch. Last year was very busy for me and I was not able to send this information sooner.



by:

On a +~3.5K mile round trip this last spring, this pin box provided greater stability than the original. There was a substantial reduction in porpoising along with smoother recovery from pot holes/irregularities, however there still remained a slight “chuck.” Overall, a better design.



by:

Super fast shipping. Easy install. Heavy buggar so hired two young ones to hold it while I bolted it into place. Coming up into the 1000 mile usage mark and it is doing its job well absorbing road shock. In New York state now. PA roads are awful bumpy so it got several good tests.



by:

The hitch bolted up easy, and seems to react well between the truck and 5th wheel



by:

I went from a standard stock hitch to the gen Y. The difference is just amazing. When I get a new 5th wheel I will definitely be getting Gen Y again. I have zero complaints.



by:

Extremely pleased with the product and the delivery of the product. Installation was completed and very easy,



by:

I love my hitch



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by:

the pin box worked awesome. If I need an other I will get the Gen y again



by:

Michael M. profile picture

Michael M.

8/21/2024

great



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Hands dow the best Fifthwheel hitch you can buy. I had this hith over a year now and is the best one i ever had.



by:

Arrived as expected and had the installation completed in about two hours. My expert salesman saved me alot of misery because I had intended to order the wrong hitch and he corrected the error. Excellant service and really refreshing to work with people who really care.



by:

The site says free shipping. I am a week past the delivery date and I am spending an hours on hold trying to track my package down. Don’t waste your time with etrailer just buy it from the manufacturer and get better service.



by:

It definitely smooths out the ride and reduces chucking. Not entirely but a large amount.


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See what our Experts say about this Gen-Y Hitch 5th Wheel Pin Box

  • Recommended Gen Y Executive Pin Box
    Thanks for the picture! I just spoke with my rep at Lippert and your 5th wheel trailer has a 1621 pin box with a 15,500 lbs capacity. The best air ride type option for your 5th wheel is going to be the Curt Flex Air 5th Wheel Pin Box item # LC328492. The Curt has a 18,000 lbs capacity and is going to be the best option to smooth out your ride. The Flex Air uses an internal air bag and strut that work with a rubberized pivoting head to absorb road shock and reduce chucking. The correct...
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  • Recommended Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box to Replace a Lippert Rhino
    No, it does not but I have one that does. It is the Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box item # GY86GR. This pin box is custom designed for the Lippert Rhino bolt pattern. It has an identical 21,000 lbs towing capacity and a 3,500 lbs tongue weight to the one you were looking at. The Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box item # 325-GH-8040 you were looking at fits the Lippert 1621 and 1621 HD pin boxes.
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  • Which Pin Box Is Better At Absorbing Chucking The Gen-Y Pin Box Or Curt Flex Air
    Hey Jim, When it comes to chucking I'd have to say that the Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box # 325-GH-8040 is going to be the better option over the Lippert/Curt Flex Air Pin Box # LC369535. The Gen-Y has a rubber torsion spring design that helps absorb both downward and upward movements from the trailer when hitting a bump in the road. The Flex Air uses an air spring and shock that are great for downwards forces but aren't the best at pulling the trailer back down as it bounces...
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  • Correct Gen-Y Hitch Executive Pin Box for a 9,300 lb GVWR 5th Wheel Trailer
    The shocks on the Gen-Y Hitch Executive will help to improve your start/stop ride quality while flat towing, especially if you are currently using an un-cushioned pin box from the factory. The part # GY46FR you're looking at has a tongue weight range of 2,500 lbs - 5,500 lbs which is quite high for your 9,300 lb GVWR trailer so we need to use the part # 325-GH-8040 instead which is meant for a tongue weight range of 1,501-3,000 lbs. Please note this pin box is a replacement for a box...
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  • Does Using Gen-Y Capture Plate for Pullrite Hitch Also Require Using Pullrite Capture Plate
    You would only need to use the Gen-Y Capture Plate # GY98FR and the filler shim part # GY76FR and would not need to use the current capture plate as well. You'd only need the Gen-Y components with your Pullrite hitch.
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  • Is A Capture Plate Needed To Tow A Trailer With A Gen-Y Pin Box With A Demco Autoslide
    Yes, you'll need capture plate # GY98FR in order to tow a trailer with a Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box # 325-GH-8040 using a Demco Autoslide 5th Wheel Hitch # DM8550034. As the head of the Autoslide turns it slides back giving you more turning clearance. Without a capture plate the king pin would be able to rotate in the jaws of the hitch and wouldn't force the head to turn and slide back.
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  • Comparing Gen-Y Hitch Gooseneck Pin Box 325-GH-8040 and GY66FR
    The Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box - Lippert 1621 and Lippert 1621 HD - 18,000 lbs # 325-GH-8040 you were looking at is rated for 18000lbs trailer weight and 3500lbs pin weight, so this will likely be the best option for you as long as your current pin box is a Lippert 1621 or 1621HD. If your loaded trailer has a pin weight that exceeds the 3500lb maximum when loaded stepping up to the Gen-Y Hitch Shock Absorbing 5th Wheel to Gooseneck Pin Box - Lippert 1621/1621 HD - Auto...
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  • Solutions For Raising The Nose Of A Fifth Wheel Trailer To Ride Level While Towing
    Pin boxes are typically very close in height so it'd really being pushing it to get to 2-3" of additional height. Torsion pin boxes like the Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box # 325-GH-8040 can offer a tiny bit more height than a standard pin box, but they also flex under pressure and could end up being at the exact same height or less than you already have. The Curt Flex Air 5th Wheel Pin Box # LC369535 is one of the largest options on the market due to it's air spring and...
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  • Pin Box Upgrade Option For A Leland 7920 Pin Box
    I took a look at the Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box # 325-GH-8040 that you mentioned and it's actually going to be a fit for the Lippert 1621 and 1621 HD 5th-wheel pin boxes, and not your Leand 7920, however I do have another solution. Instead, take a look at the: -Trailair Air Ride 5th Wheel King Pin # UF35-946208. This pin box is designed to upgrade your Leland 7920, has a weight capacity of 21,000lbs, and features cushions that absorb road shock to improve overall handling...
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  • What is the Width of the Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box - Lippert 1621 # 325-GH-8040
    The width of the Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box - Lippert 1621 and 1621 HD - 18,000 lbs - 3.5K TW # 325-GH-8040 is 12". The best way to determine if that will be a fit to replace your current pin box on your 2020 Sandpiper is to find the pin box number on the current pin box. In order to determine what type of pin box you have on your Sandpiper 5th Wheel Trailer, you will need to locate the part number of the pin box. This number is usually located somewhere on the pin...
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  • Troubleshooting A Bouncy Ride On A Vanleigh RV Vilano 325RL Fifth Wheel Trailer
    If you're getting that much bounce out of your trailer that would lead me to believe that maybe the MORryde IS suspension system is the actual issue. Typically if the suspension is too stiff you'll start to bounce. We see this issue a lot when people install Timbrens on their vehicles. You'll hit a bump in the road and the rubber is so stiff that when the frame hits the spring it ends up absorbing the shock instead of the spring giving you a rough ride. We haven't seen much of the IS yet...
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  • What are Dimensions of Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box part # 325-GH-8040
    In general the height between the fifth wheel pin boxes aim for the same figures so that they don't cause the trailer to sit drastically different. I attached a dimension picture for the # 325-GH-8040 for you to check out and compare to what you have now though.
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    Image 1 for Image 2 for
  • Recommended Gen-Y Executive Pin Box for a Lippert 1621 Bolt Pattern
    Hey Greg! Thanks for the information and the pictures! I just heard back from Lippert and confirmed your Prime Time Crusader 5th wheel has a 1621 pin box like you said. To upgrade to a Gen-Y you'll need item # 325-GH-8040. I am a big fan of the Gen-Y Executive pin boxes because they use technology that's similar to torsion axles. The internal bumpers limit bounce and help to isolate the tow vehicle from road shock transferred from the 5th wheel to your truck. The Gen-Y item # 325-GH-8040...
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  • Can Gen-Y Pin Box Be Used with Demco Hijacker Autoslide 5th Wheel Hitch
    Yes, a Gen-Y pin box, like part # 325-GH-8040 you're looking at, is compatible with the Demco Hijacker Autoslide 5th wheel hitch as long as you use the Capture Plate # GY98FR. The Gen-Y pin boxes are specific on what they are replacements for, Lippert 1621/1621HD for example, and the tongue weight calculation is a little different than normal. If you let me know your pin box number and tongue weight capacity I'd be more than happy to help make sure you get the correct Gen-Y pin box!
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  • Does Gen-Y Hitch 325-GH-8040 Replacement Pin Box Have a Minimum Tongue Weight it Will Work With
    The Gen-Y Shock Absorbing Pin Box, part # 325-GH-8040 has a shipping weight of 126 lbs. Once the shipping packaging is removed, it'll weigh about 115 lbs. According to Gen-Y, the replacement pin box will work great for a 1625 lb fifth wheel pin weight, there isn't a minimum tongue weight. I've linked you to a product description video that you might find helpful.
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  • Will Demco Hijacker Autoslide 5th Wheel Hitch Work with Gen-Y Hitch Shock Absorbing Pin Box
    The Demco Hijacker Autoslide 5th Wheel Trailer Hitchs like part # DM8550035 are compatible with the Gen-Y Hitch Shock Absorbing 5th Wheel Pin Boxes like part # 325-GH-8040 which fits a Lippert 1621 pattern. That said, you will need an adapter for this, the Gen-Y Capture Plate part # GY98FR but that will be all. This is a great combo which provides both cab clearance and a cushioned ride. Please note, in order to use the Demco Hijacker on a 2020 Chevrolet Silverado 3500 with OEM Prep Pkg...
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  • Which Is The Best System To Use a Gen-Y Pin Box Or Roadmaster Comfort Ride Suspension Kit?
    The Roadmaster Comfort Ride Leaf Spring Suspension Kit w/ Shock Absorbers # RM-2460-2560 is going to provide you with a better ride quality on your trailer. The Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box # 325-GH-8040 is only going to help reduce shock transfer and bounce from the trailer to your vehicle. I feel the Roadmaster Comfort Ride is the best bang for the buck as it will help protect your trailer and its contents from shock. Its better to eliminate shock where it starts than...
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  • Comparing Rota-Flex and Gen-Y 5th Wheel Pin Boxes
    Great question, Jeff! When the Rota-Flex first came out it renovated what a pin box could do and be, but at this point in time that technology is a little more dated and the Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box # 325-GH-8040 is the "new kid on the block" so it is definitely an upgrade to what you currently have, and you'll be happy with it for sure. The part number mentioned above will fit in place of a Lippert 1621 or 1621HD pin box and is great for a calculated tongue weight...
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  • Recommended Lube Plate for a Gen Y 5th Wheel Pin Box
    For the Gen-Y Hitch 5th Wheel Pin Box item # 325-GH-8040 you will want to use the 10" Diameter Lube Plate for 5th Wheel Trailer Hitches item # 16721. This lube plate will prevent scratches on your fifth-wheel's skid plate and ease trailer hookup.
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  • Replace RotoFlex with Pin Box That Stays Away From Bed Rails
    Most standard pin boxes will not make a 90 degree turn in anything less than an 8 foot truck bed, but that is due to being too close to the cab - not the rails. You mentioned you wanted to replace the Rota-Flex with the Gen-Y hitch. Your old pin box and your new pin box must have to be the same bolt pattern (Like #1621) which dictates how big those mounting wings are. I don't think this is a solution to your need. This will just be another pin box that does not fit. The best solution...
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  • Is The Gen-Y Shock Absorbing Pin Box A Factory Approved Replacement For Lippert Pin Boxes
    The Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box # 325-GH-8040 is an approved replacement for 1621 and 1621HD pin boxes.
    view full answer...
  • Replacing A MORryde Pin Box With A Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box
    To know what pin box will replace your MORryde pin box you'll first need to identify the bolt pattern. To do this you can follow the steps in the attached pin box identification article. This article will show you the different styles of pin boxes and from there the different bolt patterns based on their spacing measurements. Some of the most common bolt patterns used by manufacturers are the 1621, 1116, or 1716. The Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box # 325-GH-8040 will fit...
    view full answer...
  • Comparison Between Trailair Flex Air and Gen-Y Executive Replacement Pin Boxes
    Because it's lighter, less expensive, has fewer moving parts and is mechanically less complicated I'd recommend going with the Gen-Y # 325-GH-8040 shock absorbing pin box versus a Trailair Flex Air like part # LC328492. The Trailair features a pin box that cushions most of the bouncing and jarring forces. Over time, air bags can become brittle and puncture while the Gen-Y uses technology that's similar to torsion axles, using internal bumpers that limit bounce and help to isolate the tow...
    view full answer...
  • Can Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box Fit with Pull Rite SuperLite 2600
    Yes the Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box - Lippert 1621 and Lippert 1621 HD # 325-GH-8040 will work with your Pull Rite Superlite 2600.
    view full answer...


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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Lindsey S
Edited by:
Lindsey S
Employee Michael B
Edited by:
Michael B
Employee Kathleen M
Updated by:
Kathleen M
Employee Wilson B
Updated by:
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Employee John S
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