1. Fifth Wheel King Pin
  2. Lippert Components
  3. 1621
  4. Lippert
  5. Reduces Bounce and Jarring
  6. 21000 lbs GTW
Trailair Rota-Flex 5th Wheel Pin Box - Lippert 1621 - 21,000 lbs

Trailair Rota-Flex 5th Wheel Pin Box - Lippert 1621 - 21,000 lbs

Item # LC328329
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Retail:$893.20
Our Price: $575.04
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Fifth Wheel King Pin
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Shipping Weight: 118 lbs
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Lippert Components 1621 Fifth Wheel King Pin - LC328329
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This Rota-Flex pin box has a pivoting head with a built-in rubber compound that works to reduce chucking and absorb road shock, resulting in a smoother ride and less wear and tear on your trailer. Replaces Lippert 1621 pin boxes. Call 800-298-8924 to order Lippert Components fifth wheel king pin part number LC328329 or order online at etrailer.com. Free expert support on all Lippert Components products. Guaranteed Lowest Price and Fastest Shipping for Trailair Rota-Flex 5th Wheel Pin Box - Lippert 1621 - 21,000 lbs. Fifth Wheel King Pin reviews from real customers.
  • All Info
  • Reviews (29)
  • Q & A (27)
  • Photos
  • Why etrailer?

Lippert Components Fifth Wheel King Pin - LC328329

  • 1621
  • Lippert
  • Lippert Components
  • Reduces Bounce and Jarring
  • 21000 lbs GTW
  • Pin Box Upgrade
  • Cushioned
  • Fixed Turret

This Rota-Flex pin box has a pivoting head with a built-in rubber compound that works to reduce chucking and absorb road shock, resulting in a smoother ride and less wear and tear on your trailer. Replaces Lippert 1621 pin boxes.


Features:

  • Pivoting pin box replaces standard pin box on your 5th-wheel trailer to improve handling and limit strain on the truck and trailer
    • Minimizes chucking by allowing controlled movement of king pin within your hitch
  • Rubber compound built into the head absorbs road shock
    • Reduces wear and tear on trailer
  • Black powder coat provides rust resistance
  • Sturdy steel construction
  • King pin connects to any 5th-wheel trailer hitch
  • Bolt-on installation with no assembly required
  • Made in the USA


Specs:

  • Designed to replace Lippert 1621 5th-wheel pin box
  • Weight capacity: 21,000 lbs
  • 1-Year limited warranty


Diagram of measurements for the Lippert Rota-Flex pin box

Note: Do not use the Trailair Rota-Flex pin box with any type of gooseneck adapter.


The Rota-Flex pin box has a pivoting head and built-in rubber compound that help to reduce checking and absorb road shock for a smoother ride as you tow your fifth-wheel trailer.


Pivoting Head Reduces Chucking

The Lippert Rota-Flex pin box has a pivoting head to help reduce chucking

The pivoting head on the Rota-Flex allows for controlled back and forth movement of the king pin to reduce the uncomfortable jarring known as chucking. Unlike a rigid pin box that has little give at the point where the trailer and the hitch are connected, the Rota-Flex can pivot slightly to compensate for those times that your trailer suddenly pushes or pulls on your tow vehicle. Because the pin box head - not the king pin itself - is moving, the chucking that often occurs when the king pin jerks around inside the hitch is significantly reduced.


Rubber Compound Absorbs Road Shock

The Lippert Rota-Flex pin box has a built-in rubber compound to help absorb road shock

A heavy-duty rubber compound is built into the head assembly of the Rota-Flex pin box. This rubber absorbs the bumps and vibrations, or road shock, experienced when towing a fifth-wheel trailer over rough roads. Standard pin boxes without any type of shock absorption transfer road shock to your trailer, resulting in potential damage to the trailer and an overall bumpy ride. The shock-absorbing rubber inside the Rota-Flex takes the beating so there's less wear and tear on your trailer or RV and you get a smoother ride.


Easy, Bolt-On Installation

The Rota-Flex is easy to install. Simply remove your existing Lippert 1621 pin box and install the Rota-Flex on your trailer or RV. The Rota-Flex uses the same bolts that held on your original pin box so no additional hardware is required. Plus, it comes out of the box ready to be put on your trailer, so no assembly is needed. Because the Rota-Flex is quite heavy, you should put it on an elevated surface or have a friend help you support its weight during installation.



328329 Lippert Components (LCI) Rotaflex by Trail Air Fifth Wheel Kingpin Box for Lippert 1621






Customer Reviews

Trailair Rota-Flex 5th Wheel Pin Box - Lippert 1621 - 21,000 lbs - LC328329

Average Customer Rating:  4.8 out of 5 stars   (29 Customer Reviews)

This Rota-Flex pin box has a pivoting head with a built-in rubber compound that works to reduce chucking and absorb road shock, resulting in a smoother ride and less wear and tear on your trailer. Replaces Lippert 1621 pin boxes.

- LC328329
by:

Great service and fast shipping!! Great King pin . But wouldn’t fix my 5 wheel pin box. 867262



- LC328329
by:

Helps take the bumps out of our wonderful roads. 681550



- LC328329
by:

I received the pin box in good condition. Preparing to install. Much anticipation to get rid of present air ride hitch which is woefully inadequate. 576710



- LC328329
by:

Switched from a ball. Glad I did. Very well pleased. 565223



- LC328329
by:

Drove well 234094



- LC328330
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


Received on Wed. as planned. With a little help from my forklift, I had this trail air pin box installed in few hours. Fit perfect on my Sabre. Drove around the block, about 4 miles. This pulls so nice, it is like nothing behind you. Thanks etrailer. 636450



- LC176440
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


I installed this by myself (it is heavy!) by putting it in the bed of my pickup & strapping it to a floor jack but not a job I’d recommend doing it by yourself. I already have airbags on the rear axle of my pickup is why I chose this king pin . Only a 200 mile trip and the bucking on the 5th wheel was gone. But the real test will be on a rough highway... 897336



- LC176440
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


Have not installed yet, paint has been scraped off in several locations especially on top and on the rounded corners from shipping. Will have to do some touch up painting. Excited to get installed and pull trailer next weekend 894336



- LC328330
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


Received the Roto flex pin box I ordered from etrailer in about a week. Arrived in good condition and perfect fit completely satisfied with etrailer on this order 883594



- LC328330
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


It got lost by UPS, but the service and customer service was great, received my product in excellent shape. This is a very good company to do business with. I will do business with them again. Thank you Paul. 829079



- LC176440
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


Great product, Installed and what difference the ride. Thanks SJ McDonnell 818618



- LC328330
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


Came in mail packaged! Even the UPS man told me how etrailer is a legit company doing a great job shipping! Any in costumer service was great and her team had the price match over amazon done in one business day. Great to work with!! 770686



- LC328330
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


Good Product will recommend to others 660090



- LC176440
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


Definitely dampened the chucking and my wife is much happier with the ride. Also it seems to be much quieter. Noticed at the camper show many units come with the Roto flex from the factory. 603833



- LC328330
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


Had trouble receiving the hitch through UPS (they lost it --[48 miles from my residence] conversation with Stacy at etrailer and they shipped another, which my wife and I installed. etrailer was very helpful in sending another to replace the one UPS lost. Thanks so much 564168



- LC328330
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


Nice product. Would have been nice if ups didn’t loose the first one but you guys got me another one quickly 557530



- LC176440
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


Got it on and ready to try. It fit nicely. Did it myself in about an hour . Nothing left of the box it was in but other than a couple of scratches the pin box itself was in good condition 525560



- LC328330
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


I received my order promptly, faster than expected for a large item. I paid for my pin box, checked the next day and etrailer had dropped the price, they refunded the difference which impressed me greatly. I am a repeat customer and have not had a bad experience ever. 500967



- LC328330
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


Shipment was on time as promised. The packing in the box was not well done and it had some scratches. Will be trying it out in a few weeks to see how it works. 496382



- LC176440
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


The hitch arrived poorly packaged in a cardboard box. The hitch is very heavy. It was scratched and required repainting. The hitch itself looks well made and strong. 435592



- LC328330
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


This king pin assembly works well to get the chucking down. I do feel at times do to road conditions that I still feel some, but over all it has helped the ride and I feel it has take some abuse away from my truck and the trailer seems to ride better. Overall I am pleased with the kingpin assembly for the cost. The only thing I cannot do is put my cover on that was on my old kingpin. 432321



- LC328330
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


The Roto Pin Box has eliminated 90% of my chucking. The only time I get any now is on a extreme bump but it settles down pretty quick. It was also very easy to install. Some of the bolts are a little tight to get to but doable. 421068



- LC176440
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


Works great eliminated the jaring. Also shorter so I can make a hard turn without touching the sides of my box 416803



- LC328330
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


I purchased it as a direct replacement for the damaged on on my fifth wheel. 355887



- LC328330
by:

Review from a similar Trailair Rota-Flex in Fifth Wheel King Pin


I haven't opened the box yet, but it was shipped as fast or faster than I ever thought possible. As far as the product goes i am sure it arrived safe and sound. Good job! 289397


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Show More Reviews

Ask the Experts about this Lippert Components Fifth Wheel King Pin

  • Correct Capture Plate Needed to Use PullRite 4100 SuperGlide with Rota-Flex 5th Wheel Pin Box
    According to PullRite you will need to measure from the front edge of your king pin to the leading edge of the king pin plate to verify which capture plate to use with your Rota-Flex 5th Wheel Pin Box, like part # LC328329. If that measures 5-3/8" then you need capture plate 331707 but if it is just 5" then you need capture plate 331760. You can acquire either of these from PullRite.
    view full answer...
  • How To Fix a Misaligned Pad On the Trailair Rota-Flex 5th Wheel Pin Box
    Yes, the rubber cushion inside the Trailair Rota-Flex 5th Wheel Pin Box like part # LC328329 is essential to its functionality so if this is out of place or misaligned then that is certainly a cause for concern. That said, this is actually covered under warranty as it is a known issue. If you have proof of purchase then Lippert with send you an entire replacement pin box but if you do not have proof of purchase then you would need to replace the pin box on your own. If that is the case...
    view full answer...
  • Is the Rubber for the Trailair Rota-Flex Pin Box Replaceable?
    The Trailair Rota-Flex 5th Wheel Pin Box - Lippert 1621 - 21,000 lbs # LC328329 does not have that rubber compound as a replaceable part option from the manufacturer. I called to confirm that was the case and they said the rubber compound is built into the head. That rubber compound is designed to reduce wear and tear on the trailer by reducing road shock. It is extremely durable and I've never heard of anyone needing it replaced but older models had a different jounce style bumper that...
    view full answer...
  • Are 5th Wheel Trailer Pin Boxes Compatible with Gooseneck Adapters
    It really depends on the pin box and the type of adapter. In general cushioned pin boxes and pin boxes with movement are not recommended for use with adapters. Many 5th wheel trailer frame manufacturers do not allow the use of most adapters with the exception being Lippert provided that the adapter is a Reese Goose Box. So for example if your stock pin box is a Lippert 1621 you could use Reese Goose Box # RP94720 which is rated for 20,000 pounds or # RP94716 for 16,000 pounds. The use...
    view full answer...
  • Solution for Hitch Noise of Roto-Flex Pin Box Trailer Towed with Curt Q20 Hitch
    The thing that causes the noise you are experiencing is actually the hitch you have and not the Roto Flex. The biggest factor in how much noise you'll experience when towing a fifth wheel trailer is the hitch itself since it has moving parts and it's responsible for grabbing onto the trailer. The Q20 hitch you have is not known to be super quiet so I'm not totally surprised you are having issues with noise. If you wanted to quiet down your towing setup a quieter hitch would be the best...
    view full answer...
  • Troubleshooting Roto-Flex Pin Box Screeching/Scratching Noise
    The noise you described would be from the pivot point of the Rota-Flex. I spoke with my contact at Lippert and he said that typically when the noise you described is heard it is because there is a gooseneck adapter on the pin box which isn't recommended. To lube the pivot point my contact said to take the bolts out of the lower piece, pull the pin out, and then put lube in where the pin rotates.
    view full answer...
  • Install Video Guide to Use When Installing Rota-Flex Pin Box in Place of Lippert 1621
    While we don't have an install video for the exact pin box model you referenced part # LC328329 we do have install videos for similar cushioned pin boxes that fit the same application (Lippert 1621) which would work great as an install guide. I attached a video link to this page for the similar 5th Airborne part # 5AB-E1621-610 for you to check out. This will walk you through the important steps that are the same like the removal of the old box and the install of the new one. For the...
    view full answer...
  • Does Trailair Rota-Flex 5th Wheel Pin Box Have Bolster Plate
    I spoke with my contact at Lippert regarding the Trailair Rota-Flex 5th Wheel Pin Box # LC328329 and he said that the heavy-duty rubber compound that's built into the head assembly serves as the bolster plate. It will do a great job of absorbing bumps and road shock as well as adding support to the connection. I have also attached an image pointing out this component on the pin box.
    view full answer...
  • Replacement Fifth Wheel Pin Box for Lippert 1621 to Improve Quality of Ride
    We do not carry MORryde pin boxes. We do have the Trailair Rota-Flex # LC328329 which uses a rubber compound to decrease road shock and improve the ride of your trailer. Also, the Trailair Air Ride # LC158778 has an air bag and built-in shock to absorb road shock and minimize chucking. Both products come fully assembled, are rated at 21,000 pounds, and will bolt-on to replace your Lippert 1621 pin box.
    view full answer...
  • Rota-Flex 1621 Compatible Pin Box Fit with Lippert 1621HD Brackets
    The Trailair Rota-Flex 5th Wheel Pin Box - Lippert 1621 - 21,000 lbs # LC328329 will mount on the standard 18,000 lb 1621HD frame with one hole modification. The actual trailer capacity won't increase, so you may want to stick with the 18K Rota-Flex # LC328330. I reached out to my tech contact and the 1621 pin box does have one hole that is slightly different than the 1621HD. The lower front hole is higher on the 1621HD box so you would need to drill one hole on each side of your mount...
    view full answer...
  • What are Available Capacities for Lippert Rota Flex Pin Boxes to Replace 1621 Pin Box
    For Trailair Rota-Flex pin boxes that fit as a replacement for a Lippert 1621 we have the 21k part # LC328329 and we have the # LC328330 which it sounds like you have. I can assure they aren't both really rated for 21k and the only difference is a part number and a few stickers. While the differences are hard to see by just looking at pictures of the two the 21k version is reinforced in areas you can't see and does have a higher capacity. If you are going to be over the 18k capacity...
    view full answer...
  • Will Trailair Rota-Flex 5th Wheel Pin Box for Lippert 1621 Reduce Chucking
    The Trailair Rota-Flex 5th Wheel Pin Box # LC328329 that will replace your Lippert 1621 has a rubber compound in the head, so it will have an affect on your ride, helping to reduce the chucking you are experiencing. That said, the rubber compound does not have as much give as an air bag, so you will still feel it, just not as drastically. So if you looking to severely limit the chucking and get the most comfortable ride possible the best option to replace your Lippert 1621 pin box is...
    view full answer...
  • Capture Plate for Lippert Trailair Rota-Flex Pin Box and Demco Hijacker Autoslide 5th Wheel Hitch
    I believe that you are referring to the Lippert Trailair Rota-Flex 5th Wheel Pin Box like part # LC328329 which has the pivoting head. If this is the case then yes, the Demco Hijacker Autoslide Capture Plates # DM6171 are what you need to use so that you can use the Demco Hijacker Autoslide like part # DM8550034. Attached is a picture and review video of these 3 products installed together for you to reference.
    view full answer...
  • Which Trailair Rota-Flex Pin Box Compatible with Lippert 1621 Pin Box
    I have a solution for you, but the Trailair Rota-Flex # LC176440 pin box is designed to replace 5th wheel trailers with a Lippert 1116 pin box and not the 1621 pin box. Instead, you'll want to use either the # LC328330 (trailer with GVWR of less than 18000-lbs) or the # LC328329 (trailer of GVWR less than 21000-lbs). The Trailair Rotaflex is a great solution to help reduce the bouncing and jarring that car be experienced with an uncushioned pin box and will be a great upgrade for your towing...
    view full answer...
  • Will the Demco Recon Gooseneck-to-5th Wheel Hitch Work With the Trailair Rota-Flex Pin Box
    The Demco Recon Gooseneck-to-5th Wheel Trailer Hitch part # DM8550046 can be used with a Trailair Rota-Flex 5th Wheel Pin Box like part # LC328329 and there is no adapter required. That said, it sounds like you may be confusing the Trailair Rota-Flex which is a fixed pin box with the Trailair Turning Point which is a rotating pin box. The Demco Recon Gooseneck-to-5th Wheel Trailer Hitch cannot be used with a Trailair Turning Point 5th Wheel Pin Box. The benefits of the Trailair Rota-Flex...
    view full answer...
  • Replacing Lippert Rota-Flex with Reese Goose Box on 2018 Grand Design Solitude
    To replace your existing Rota-Flex 5th wheel pin box with the Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter # RP94720, you'll need to confirm its model number and weight rating. This information is typically displayed on a sticker or plate on the pin box itself. Lippert makes three models of the Rota-Flex, so the weight rating on the label is enough to identify which of these three you have: -Model 1621 Trailair Rota-Flex 5th Wheel Pin Box 18,000 lbs # LC328330 -Model...
    view full answer...
  • Replacement Upgraded Pin Boxes for a Lippert 1621 Pin Box
    Trailair Flex Air 5th Wheel Pin Box # LC328484 is actually not the correct model to replace the Lippert 1621 pin box. Instead it fits the Lippert 0719 pin box so it will not work with your trailer. For your 1621 pin box there are more options: # LC328492 rated for 18,000 pounds # 5AB-E1621-610 rated for 21,000 pounds # 5AB-E1621-16K rated for 16,000 pounds # LC158778 rated for 21,000 pounds # LC328330 rated for 18,000 pounds # LC328329 rated for 21,000 pounds The TrailAir and...
    view full answer...
  • Replacement Pin Box For Fifth Wheel Trailer With Lippert 1621 Pin Box
    I called my contact at Lippert and they told me the 119115 number you referenced is actually the Lippert 1621 pin box. We do not offer a Flex Air pin box that has a weight capacity of 21,000-lbs. The highest capacity Flex Air unit we offer is part # LC328492. it has a capacity of 18,000-lbs. We do offer the Rota-Flex pin box, part # LC328329, that can replace your 1621, and has a 21,000-lb capacity. This system has a pivoting head and built-in rubber compound that absorbs road shock...
    view full answer...
  • Is Trailair Rota-Flex Pin Box Available in 12-3/8 Inches Wide?
    The Trailair Rota-Flex 5th Wheel Pin Box - Lippert 1621 -18,000 lbs # LC328330 and the 21,000 lbs # LC328329 are 12-1/2 inches wide. The sizes of pin boxes for width are simply 12 inches or 12-1/2 inches so you would definitely want the 12-1/2 inch pin box. You will want to check your current pin box number which should be on a sticker on the actual box itself. If not there, you will want to measure your mounting bolts to ensure the correct fit. I've attached an article to assist...
    view full answer...
  • Demco Capture Plate Compatibility with Trailair Rota-Flex Pin Box
    Yes, Demco Capture Plate # DM6171 fits their Hijacker 18K Autoslide 5th Wheel Trailer Hitch head assembly # DM6077 when it is used with a trailer that has a Trailair Rota-Flex pin box like # LC328330 (18K), # LC176440 (19K) and # LC328329 (21K).
    view full answer...
  • Replacement Pin Box to Reduce Chucking on 5th Wheel Trailer with Lippert 1621 Pin Box
    For the Lippert 1621 pin box the most inexpensive option that will improve the chucking and overall ride quality when towing your 5th wheel trailer is the Rota-Flex, # LC328330. It uses a pivoting mechanism and rubber compound to dampen chucking. This version is rated for 18,000 pounds. there is also a 21,000 pound version, # LC328329. The next step up is the 5th Airborne # 5AB-E1621-16K which uses both a shock and an air bag to reduce chucking and vertical movement. It will be more...
    view full answer...
  • Measuring to Determine Which Pin Box is on Fifth Wheel Trailer
    If there is not a sticker or stamp on your pin box which has the model on it, you can either call the manufacturer with your VIN and they should be able to tell you, or you can take some measurements and that will allow you to know what model is on your 2015 Primetime Spartan. I have added a link to a help article, "Measuring to Determine the Correct Replacement Pin Box for a 5th-Wheel Trailer" which details this process. That article will have you select the pin box style from a set of...
    view full answer...
  • Is Trailair Rota-Flex Compatible With B&W Companion 5th Wheel Hitch
    Yes, you can use a Trailair Rota-Flex 5th Wheel Pin Box like # LC176440 (which replaces Lippert 1116) or # LC328329 (which replaces Lippert 1621) with the B&W Companion 5th Wheel Trailer Hitch # BWRVK3500. I have linked video reviews below for you to check out of both the Rota-Flex and the Companion.
    view full answer...
  • Dimensions of the Rota-Flex 5th Wheel Pin Box # 328330
    The Trailair Rota-Flex 5th Wheel Pin Box - Lippert 1621 - 18,000 lbs # LC328330 does require capture plates for the Demco Hijacker autoslide that is similar to the Pull Rite Autoslide you have. The measurement from the front of the plate to the king pin is 4-1/2 inches. The overall plate is 11.387 inches by 12.655 inches.
    view full answer...
  • Recommended 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter To Improve Ride
    We do offer Air Ride Goose Box pin boxes that will work with a gooseneck hitch in your truck. The included air bag and dual shocks help provide cushion and reduce road shock, while improving the overall ride. If you have a Lippert 1621, 0719, or 1621HD, or Fabex PB-600 series pin box on your trailer you can use part # RP94716 with a 16,000-lb capacity. For a 20,000-lb capacity pin Air Ride pin box you can use part # RP94720 if you have a 1621 or 1621HD Lippert pin box on your...
    view full answer...
  • How To Determine What 21,000 lb Fifth Wheel Pin Box Upgrade Will Fit Fifth Wheel Trailer
    I can help you determine the correct fifth wheel pin box upgrade that will fit your 2015 Forest River Blue Ridge 3025, though we do not have any type of list of each part number on each year, make and model of trailer. Instead, you will need to know is the manufacturer and model number of the pin box on your fifth wheel and match that with the correct replacement. If you take a look at your pin box you should be able to find a sticker or a stamp that has the number on it, and once you find...
    view full answer...
  • Will The Trailair Flex Air 5th Wheel 18000 lb Capacity Pin Box Fit My 2017 Dutchmen Voltage 3990?
    I can confirm that the Trailair Flex Air 5th Wheel Pin Box - Lippert 1621 - 18,000 lbs, # LC328492, is a fit for your trailer's pin box. I highly recommend this pin box because of the Flex Air System. The air bag absorbs road shock and the scissor-like motion allows the pin box to compress, compensating for bounce and chucking. The shock absorber ensures that the pin box rebounds and keeps the air bag from breaking down. There is a rubber compound built intot he head that helps absorb...
    view full answer...

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Info for this part was:

Edited by:
Lindsey S
Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
Jeffrey L
Installed by:
Jeff D
Installed by:
Randy B
Video Edited:
Jacob T
Written by:
Chelsea B
Video by:
Jonathan Y

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