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  1. Fifth Wheel King Pin
  2. Gen-Y Hitch
  3. Fabex 665
  4. M and M 665
  5. 30000 lbs GTW
  6. Absorbs Road Shock and Reduces Chucking
Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box - Fabex 665 and M&M 665 - 30,000 lbs - 4.5K TW

Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box - Fabex 665 and M&M 665 - 30,000 lbs - 4.5K TW

Item # GY65SR
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Our Price: $1,084.86
Fifth Wheel King Pin
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Shipping Weight: 160 lbs
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Product Expert Kathleen M

Is this right for you? Product Expert Kathleen M says:

Yes, if you:

  • Drive over bumpy dirt roads or city potholes and want to soften the ride so you don't feel tossed around in your truck
  • Tow a very heavy trailer or toy hauler with a pin weight between 2,000 and 4,500 lbs
  • Have no patience for filling up an air bag every time you hit the road

No, if you:

  • Haul your trailer with a truck that sits high - this pin box adds some height which can cause chucking if you can't adjust to compensate
  • Have a short bed truck or a toolbox and need a pin box that gives you more clearance between your truck and trailer
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. The weight scale lets you monitor your vertical load. 4.5K pin weight. 1-800-940-8924 to order Gen-Y Hitch fifth wheel king pin part number GY65SR or order online at etrailer.com. Free expert support on all Gen-Y Hitch products. Guaranteed Lowest Price and Fastest Shipping for Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box - Fabex 665 and M&M 665 - 30,000 lbs - 4.5K TW. Fifth Wheel King Pin reviews from real customers.
  • All Info
  • Reviews (101)
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  • Videos (1)
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  • Why etrailer?

Gen-Y Hitch Fifth Wheel King Pin - GY65SR

  • Fabex 665
  • M and M 665
  • 30000 lbs GTW
  • Absorbs Road Shock and Reduces Chucking
  • Gen-Y Hitch
  • Upgraded Pin Box
  • Fixed Turret

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. The weight scale lets you monitor your vertical load. 4.5K 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
  • Pin weight scale is built in to help you balance your trailer
    • Meter lets you know if your load needs to be adjusted before you tow
  • Heavy-duty steel construction
  • Powder coat finish resists wear and corrosion
  • Simple, bolt-on installation
    • Mounts with included 5/8" diameter bolts
  • Made in the USA


Specs:

  • Designed to replace Fabex 665 and M&M 665 5th-wheel pin boxes
  • Towing capacity: 30,000 lbs
  • Pin weight capacity range: 2,000 lbs - 4,500 lbs
  • 5-Year limited warranty


Notes:

  • 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 Fabex 665 or M&M 665 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.


Easily Check Your Vertical Load

The vertical load, or pin weight, refers to the weight that a fully loaded trailer exerts downward on the hitch in the truck bed. Too little vertical load can cause trailer sway and too much can cause poor performance.


This Gen-Y pin box has a built-in mechanical scale so that you can check to see if your vertical load is too high or too low. The highest arrow on the scale indicates your maximum vertical load (4,500 lbs). The lowest arrow indicates no vertical load (0 lbs). A vertical load of at least 2,000 lbs is recommended for the built-in shock absorption to function effectively. This means that the scale's white indicator marker should be between the highest arrow and the middle arrow when you hook up your trailer to tow.



GH-8050 GenY Hitch Executive Fifth-Wheel King Pin Box with Torsion Shock Absorption - Fabex 665/M&M 665 - 30K

GH-80943 Mounting Bolt Kit for Gen-Y Executive 5th Wheel Pin Box





Video of Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box - Fabex 665 and M&M 665 - 30,000 lbs - 4.5K TW

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Review of Gen-Y Hitch Gooseneck and Fifth Wheel Adapters - Upgraded Pin Box - GY65SR

Hello everybody, this is Jeff at etrailer.com. Today, we're gonna take a look at the Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box for the Fabex 665 and the M&M 665 pin boxes, and this has a 30,000 pound gross towing weight capacity. Now, this 5th wheel kingpin box is an upgrade to the existing Fabex 665 or M&M 665 pin box that's on your 5th wheel trailer. This 5th wheel pin box will replace the factory pin box on your trailer, and the kingpin right down here is what'll insert into your truck's 5th wheel hitch. Now, this one here uses a nice shock absorbing design, which ensures a nice, smooth, steady ride. The technology in this functions just like a torsion axle to limit transfer of road shock from your trailer to the truck and vice versa.

Wanna pop an insert up there just to show you what we're looking at. So if you look at these sections right here where these bolts are, it's gonna have the technology I mentioned. Like a torsion axle, it has the outer tubes with the rubber cords around the inner bar, and this will help reduce any chucking and rough fore-and-aft motion, it'll also limit any bounce and jarring up-and-down motion. And what's nice about this system is there's no air bags that you have to maintain, and there's fewer moving parts to repair or replace them with some of your other shock absorbing solutions that are out there. Now, this pin box also offers a pin weight scale, which is built in to help you balance your trailer, that scale's located on this lower arm right here, and that'll let you know if the load needs to be adjusted before you tow.

The vertical load or pin weight that refers to the weight that a fully loaded trailer will exert downward on the hitch in your truck bed, and too little hood vertical load can cause trailer sway, too much can cause poor performance. I did wanna zoom in and show you that scale I'm talking about, you can see it right here. That scale has a red on each end, at the very top up here, that is the maximum vertical load, and then the red at the very bottom is the minimum vertical load, the green that you could see as in the middle. Now, the red areas are the too high and too low areas, so you don't want the white indicator line that's over here to be in those areas, you want it to be in the green area. The maximum red right up here, that indicates the maximum vertical load of 4,500 pounds, the red at the bottom is the minimum red, and that indicates no vertical load.

So you do wanna be in the green, which is a pin weight capacity range of 2,000 pounds to 4,500 pounds, and a vertical load of at least 2,000 pounds is recommended for this built-in shock absorption to function effectively. So basically again, that white indicator line there, when you get this all hooked up and loaded down, you want that line to be indicating in the green area. Now, this is a nice heavy duty steel construction, has a nice powder coat finish to resist wear and corrosion. It is a simple bolt on installation, the mounting holes on this will line up to the factory holes and it mounts with these included 5/8 inch diameter bolts and washers to install. This is made in the USA.

Again, the towing capacity on this is 30,000 pounds. But that should do it for the review on this Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box for the Fabex 665 and the M&M 665 pin boxes..


Customer Reviews

Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box - Fabex 665 and M&M 665 - 30,000 lbs - 4.5K TW - GY65SR

Average Customer Rating:  4.8 out of 5 stars   (98 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. The weight scale lets you monitor your vertical load. 4.5K pin weight.

by:

Review from a similar Executive King Pin in Fifth Wheel King Pin


The Gen-Y gooseneck has been excellent! I now have approximately 12k miles on mine and it rides very nicely with very limited chucking and handles rough roads very well. I’d highly recommend that you contact Gen-Y BEFORE ordering to ensure you get the correct load rating product. Gen-Y and Etrailer have provided excellent customer and tech support! This product definitely frees up your truck bed and does require a precise line up to hitch.




by:

Review from a similar Executive King Pin in Fifth Wheel King Pin


Man,this thing is GREAT! It was 1 day late on delivery, but other than that, it bolted right up using the existing holes, NO DRILLING! I was THRILLED!
It works as advertised, the powder coat paint is awesome, the auto latch works flawlessly. I am very pleased
I would recommend anyone wanting to switch a 5th wheel kingpin to a gooseneck to use Gen-Y. They got their act together!




by:

Review from a similar Executive King Pin in Fifth Wheel King Pin


I originally had an Andersen ultimate
Made
me nervous with cracking welds etc
Switched to the Gen Y
Never looked back
Took a few hundred miles to break in but now it pulls super smooth




by:

Review from a similar Executive King Pin in Fifth Wheel King Pin


Direct fit, easy installation, only thing is had to move to the top set of holes on the trailer brackets. Looks great




by:

Review from a similar Executive King Pin in Fifth Wheel King Pin


Definitely recommend this hitch




by:

Review from a similar Executive King Pin in Fifth Wheel King Pin


Installation took 1 hour with 2 people. Made very well. Pulled trailer great and expect ride to get better with break in. I went with 3.5k and on lighter side of recommended king pin weight. Shipping was quick and had email notifications the whole way. Will use etrailer again




by:

Review from a similar Executive King Pin in Fifth Wheel King Pin


I have a short bed diesel truck with a B&W gooseneck system installed. I purchased the GEN-Y Gooseneck to install on my new 5th wheel. I have a gooseneck horse trailer, so this choice was obvious. I ordered the GEN-Y from etrailer, we had a lot of back and forth discussions on shipping and arrival dates. I had my local RV dealer install it, way to heavy for me to wrangle. The RV dealer had never heard or seen the GEN-Y product line before, they were so impressed that they are now the authorized GEN-Y dealer in my area. When I hooked my 5th wheel I didn't have enough space between the truck cab and the 5th wheel to maneuver. I had mistakenly thought the GEN-Y would provide enough added space, wrong. I called etrailer to discuss and express my concerns and asked if they had any info to help me. The courteous customer service representative acted like they had never heard of this problem before and would certainly look into it and call me back. Nope, never heard from etrailer.com again. I did my own research and found a gooseneck extension ball manufactured by B&W and it is rated at 20k. This made it possible to actually maneuver the 5th wheel. This B&W extension should be recommended by etrailer every time a Gen Y gooseneck hitch is sold to a short bed truck owner. But, since etrailer had never heard of this problem don't count on it. I am very disappointed with their customer service.
Regarding the GEN-Y, this is a beast and built so well. While towing my 5th wheel I am fully enjoying the torsion shock absorbing technology. One area for improvement on the GEN-Y, the release cord does not have method to keep the release cord open without holding it. On a competitors version (Reese) they have a method to hold it open. See pic for this method, I plan on adding this to my GEN-Y, which is otherwise a far superior product in my opinion. Love the GEN-Y, not so much for etrailer.




by:

Review from a similar Executive King Pin in Fifth Wheel King Pin


This works absolutely perfect in a Ram 3500 with 6 1/2 ft bed, and the Gen Y gooseball hitch.
I think if more people knew of this combination, the fifth wheel style hitch, Anderson hitch and others would become obsolete.
Get to your destination, disconnect, pull out the ball, and the bed of your truck is free!




by:

Review from a similar Executive King Pin in Fifth Wheel King Pin


Works great and I have my bed space back and not tied up with bulky fithwheel plates and rails. Trailer pulls great a lot quieter and reduced chucking.




by:

Review from a similar Executive King Pin in Fifth Wheel King Pin


Worked out perfect for my application. 2022 Ford F-250 4x4




by:

Review from a similar Executive King Pin in Fifth Wheel King Pin


Installation was very straight forward, it is heavy so you need something to prop it up for you while you get at least one bolt started in each side. I used the bucket on my tractor to hold it up. I only have one tow in so far for about 50 miles so still early to review. It certainly works as advertised for taking out a lot of the trailer feedback on rough roads, uneven transitions, etc. It is an improvement in ride quality and makes towing a big fifth wheel more comfortable. Necessary? Probably not but it does spoil you a little bit. One problem though that Gen-Y is working on fixing is the ball to pinbox is a little bit longer and I did hit the bed cap at about 60 deg of turn while backing in at an angle. It cleared when I tested it in the flat driveway, but not by much. They are going to come up with a fix. I'm at 7 1/2" clearance from the overhang to the bed caps sitting flat. This is with a '18 Chev Silverado HD 8' bed and a '19 Momentum 351M




by:

Review from a similar Executive King Pin in Fifth Wheel King Pin


If you have a short bed truck do not buy this gooseneck. At first it seem fine but unless it’s a long bed it’s shorter than you think. If you go up a small incline sideways so the rear of your RV will not scrape it will give enough to crush the side of your truck. I thought the gooseneck would give me a little more length or space and it did not it was actually shorter only in a long bed truck would you get better space


Comments
It is possible that you could use this adapter with a 6.5 foot bed however there would be measuring that would be done and possibly a different set up in your bed. You would need a gooseneck system that would allow you to use an offset bed that would give you more room. You would also want to use the formula found in the ask the experts answer that I have linked below.
-- Etrailer Expert Jenny N - 03/14/2022


by:

Review from a similar Executive King Pin in Fifth Wheel King Pin


I don't have the turning point

I
do have the 1621 auto latch 3.5 and it is great. So happy to have use of my bed when I am not pulling the trailer




by:

Review from a similar Executive King Pin in Fifth Wheel King Pin


The looks and ride of the hitch are great. The only flaw is hooking up can be a pain if you don't have a rear camera on your cab. Unhooking can also be a bit tricky as well. Otherwise very happy with the ride.




by:

Review from a similar Executive King Pin in Fifth Wheel King Pin


Overall this is a great quality product. Packaging and shipping were a breeze and fitment was perfect. I would recommend this product to anyone. I installed this on a 2018 Forest River Cherokee Arctic Wolf to replace the OEM Turning Point pin box.




by:

Review from a similar Executive King Pin in Fifth Wheel King Pin


This was better than I expected. Truck felt smoother going down the road with our new 5th wheel than with our previous rig with a standard 5th wheel hitch even though the new rig was about 3.5k lbs heavier. I believed the claims of a smoother ride because of the torsion action but I was really amazed at how much better it was. The one I was skeptical about was the improved mileage claim. After a 7 week long RV trip putting over 4K towing miles with a heavier, (and slightly taller trailer), I was averaging the same, even slightly better, as with my previous rig with the same tow vehicle. This setup also freed up the bed of my truck tremendously. It also lowered my pin weight/payload number by about 70lbs as compared with the original Pinbox and 5th wheel hitch I had. Great product.




by:

Review from a similar Executive King Pin in Fifth Wheel King Pin


The gen-y hitch is awesome. Very glad I switched from 5th wheel to gooseneck. Love having the extra space and with the removal of the puck ball I have a full open bed. The gen-y torsion system makes for a smooth ride




by:

Review from a similar Executive King Pin in Fifth Wheel King Pin


Quick, easy install. And this thing took the fifth wheel amazingly. My first trip was from Tulsa to Memphis. Most of the ride was 70 cruise control and there were quite a few times I saw the fifth wheel bouncing around in the back, but hardly felt it in the truck. I have a 2019 F350 DRW. The shipping was quick, I bought on a Sunday and had by Wednesday. The install was fairly easy with two people. Just don't forget to retorque the pin box bolts after a few hundred miles. No regrets purchasing this thing.




by:

Review from a similar Executive King Pin in Fifth Wheel King Pin


Allows me to tow my 17000 lb camper better and easier than towing my 10000 lb trailer. Removes the jerking between truck and trailer just like they say.




by:

Review from a similar Executive King Pin in Fifth Wheel King Pin


Works great. Trailer stays attached to the truck most of the time.




by:

Review from a similar Executive King Pin in Fifth Wheel King Pin


received in a timely manner. the shock absorber may help up and down motion but on short test drive i still felt back and forth jerking. my other gooseneck bent tho so still happy with how solid this looks and i think i wont have issues with it breaking.




by:

Review from a similar Executive King Pin in Fifth Wheel King Pin


Bolted right on. And my camper tows better than ever! I have a flatbed with a recessed ball. The 5th wheel hitch was just too high. Causing the camper to ride nose high. This solved all those problems and cleared up my bed too!




by:

Review from a similar Executive King Pin in Fifth Wheel King Pin


American made quality, and it shows !! Thanks Gen-Y




by:

Review from a similar Executive King Pin in Fifth Wheel King Pin


Haven't got to use the hitch yet but l am sure it will work fine.. Adam Y and the folks at etrailer are top notch. The only place to shop for truck, trailer and camper accessories.




by:

Review from a similar Executive King Pin in Fifth Wheel King Pin


Engineering looks great it was simple to install but honestly have not had a chance to pull the trailer yet.



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See what our Experts say about this Gen-Y Hitch Fifth Wheel King Pin

  • Recommended Replacement for Fabex MDL 665 Pinbox
    For an amazing replacement for your Fabex MDL 665 pinbox, I recommend the Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box # GY65SR. The Gen-Y pinbox is designed to fit the bolt pattern of your fifth-wheel trailer. As far as capacity, it has a really high capacity of 30,000 lbs of maximum towing capacity and 4.5K tongue weight capacity. It comes with shock-absorbing technology to provide you with an ultra smooth, steady ride. On top of it all, it is 100% made in the U.S.A. If you need a lighter...
    view full answer...



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Info for this part was:

Employee Lindsey S
Written by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Kathleen M
Updated by:
Kathleen M
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Updated by:
Alexander C

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