bing tracking image
  1. Fifth Wheel Installation Kit
  2. B and W
  3. Below the Bed
  4. Custom
Custom Underbed Installation Kit for B&W Companion 5th Wheel Trailer Hitches

Custom Underbed Installation Kit for B&W Companion 5th Wheel Trailer Hitches

Item # BWGNRK1111-5W
Our Price: $599.00
Fifth Wheel Installation Kit

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

This item qualifies for Free Shipping
Shipping Weight: 93 lbs
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Customer Photos

Need help with installation?
Locate installers near me
Install a Companion fifth-wheel hitch in your truck bed with this custom kit. Better than a traditional mounting kit, this setup doubles as a gooseneck hitch when the fifth wheel is removed, and the underbed design allows for full bed access. 1-833-496-1390 to order B and W fifth wheel installation kit part number BWGNRK1111-5W or order online at Free expert support on all B and W products. Great prices and Fastest Shipping for Custom Underbed Installation Kit for B&W Companion 5th Wheel Trailer Hitches. Fifth Wheel Installation Kit reviews from real customers.
  • All Info
  • Reviews (31)
  • Q & A (0)
  • Photos
  • Why etrailer?

B and W Fifth Wheel Installation Kit - BWGNRK1111-5W

  • Below the Bed
  • Custom
  • B and W

Install a Companion fifth-wheel hitch in your truck bed with this custom kit. Better than a traditional mounting kit, this setup doubles as a gooseneck hitch when the fifth wheel is removed, and the underbed design allows for full bed access.


  • Lets you install your B&W Companion 5th wheel trailer hitch (BWRVK3500 or BWRVK3400)
  • Doubles as heavy-duty Turnoverball gooseneck trailer hitch
    • Includes rails, gooseneck hitch head, safety chain loops, and hitch ball
  • Provides complete truck bed access when you're not towing
    • Single hole in center of bed is mounting point for hitch
  • Installs easily using existing holes in your vehicle's frame
    • No welding or frame drilling required
    • Truck bed does not have to be removed
    • 4" Diameter hole must be cut into bed
  • Powder coated steel is sturdy and corrosion resistant
  • Made in the USA
  • Limited lifetime warranty

B&W Turnoverball Gooseneck Trailer Hitch

B&W Turnoverball Gooseneck Hitch

Not only does this kit provide you with a sturdy, custom base for installing your Companion fifth-wheel trailer hitch in the bed of your truck, but it also doubles as one of the most recognizable gooseneck hitches on the market. This fifth wheel installation kit actually is the Turnoverball gooseneck hitch from B&W.

Gooseneck Specs:

  • Gross towing weight: 30,000 lbs
  • Vertical load limit: 7,500 lbs
  • Ball size: 2-5/16"

B&W Companion Installed in Turnoverball Gooseneck Hitch

With the B&W Turnoverball underbed gooseneck trailer hitch you get the best of both worlds. When you go to tow a gooseneck trailer, the Turnoverball creates a sturdy, dependable connection with your trailer. And when you're done towing, you can stow the ball upside down in the hitch to get full bed access and a clean appearance. When you're ready to tow your fifth wheel trailer, just install the Companion in the ball hole in place of the gooseneck ball and lock the post in place using the built-in handle. You can remove the fifth wheel when you're done towing, leaving your truck bed open once again.

Simple, Custom Installation

This kit is custom designed for your vehicle. The mounting brackets bolt to existing holes in your truck's frame. While some modification is required - you will need to cut a 4" diameter hole in your bed for the hitch ball and drill holes for the built-in safety chain loops - there is no need to weld onto or to drill into your frame.

Once you have the brackets and center section installed, set up the operating handle. This handle is designed to be accessed from the rear driver's-side wheel well. On the end of the handle is the heavy-duty steel pin that secures the mounting post of the Companion (or the base of the gooseneck hitch ball).

GNRM1111 B and W Turn Over Ball Under-Bed Rail Kit

GNRC800 B and W Turn Over Ball Center Section

Installation Details BWGNRK1111-5W Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Customer Reviews

Custom Underbed Installation Kit for B&W Companion 5th Wheel Trailer Hitches - BWGNRK1111-5W

Average Customer Rating:  4.9 out of 5 stars   (31 Customer Reviews)

Install a Companion fifth-wheel hitch in your truck bed with this custom kit. Better than a traditional mounting kit, this setup doubles as a gooseneck hitch when the fifth wheel is removed, and the underbed design allows for full bed access.


Thanks for all the information on such a big and important purchase. Great photos and even better videos!

At first I looked for a shop to install my hitch, but after watching your videos I decided to go for it myself. If you read the directions carefully and have average wrenching skills the B & W underbed install for gooseneck was pretty straightforward.

It took perhaps 4 hours for me to install. Now I KNOW it was installed correctly and understand the hitch system to a t. Great product. Hooked up to my 15,000 lb fifth wheel and towed with ease using the Companion 5th wheel set up that is designed to be used with the underbed gooseneck.

Everything was delivered on time and in great condition and the quality of the B&W is outstanding. Thank you!


Great Product !!!!!!!!!!!!!!!!!!!!!!!! I have hauled my large 42 foot 5th wheel across the country with this hitch and the B&W companion 5th wheel hitch. Best in the world I love it very quit and stable!!!!!!!!!!!!!!! Great job guys at B&W and thank you etrailer for selling the best product!


The video sent via email with the purchase was 100% exact to my truck and made it really easy to install. I never had to look at the directions because the video showed everything step-by-step. A local truck supply shop was going to charge $700 and said it would take all day. I did it in 4.5 hours with the video and it was the first time installing one of these. Highly impressed overall.

2016 Ford F-350-Super-Duty

All in all everything went together pretty well and I did the install single handed. Couple whacks with a mallet and a few choice %$#@ and a ^%[email protected]!, and it went together exactly as described. Another pair of hands would certainly have helped with the center section but only a bit. Missing one flat and one lock washer- 2 washers away from 5 stars. Can't really complain too much about that so I'm a satisfied customer!

Thank you etrailer


I spoke with Jamie to make sure I ordered the correct 5th wheel hitch for my truck and she went above and beyond. Ordered 11-July (Monday morning) and was delivered 14-July (Wednesday afternoon). I couldn't have asked for a better experience. Haven't installed the hitch yet so only time will tell on that.


Only 1 washer was the wrong size.

I will have our Customer Service team reach out to you.
-- Etrailer Expert Jenny N - 05/04/2022


High quality product made in USA my brother and I installed in about 3hrs can’t wait to use good instructions!!! Thank you B&W.

2011 Ford F-250 and F-350 Super Duty

Product quality was outstanding. Shipping was the fastest I've ever received with something this heavy. Customer service was great and I couldn't have asked for a better experience... Thank you!!!


This item was delivered On time and in great condition...the installation instructions were easy to follow and went in as stated. I was hesitant to saw a 4 in h hole in the bed of the truck thinking it might be off fit exactly where the hole was. Sweet! I just can't say more a out how happy we are with this. This is my second item delivered from etrailer. I got the fifth wheel for the Dodge truck also. Thank you.

2015 Ford F-250 Super Duty

This is my 2nd B&W underbed 5th wheel/gooseneck kit. Both have installed with reasonable ease, especially considering how many parts under the bed can interfere. No cutting or modifying to fit required. All hardware is provided and everything is heavy duty. This went on a 2015 F250 gas. If I get another truck I will get another B&W kit.

2015 Ford F-250 Super Duty

As always the product came quickly. I bought a B and W gooseneck hitch. My son and I installed it in my 2015 F-250 in about 2 hrs. It was a cake walk. Everything fit together great and extremely easy. Looking forward to using it to pull our horse trailer to go camping. Looks like I'll be buying from etrailer some more. Great products-Great Service. 5-1-20

2015 Ford F-350 Super Duty

Well made, the instructional video helped tremendously as I am a visual learner. The powder coating job is excellent and the hitch works great with the B&W Companion.


Excellent product and quick delivery.

2016 Ford F-350 Super Duty

Under bed installation went very well in my 2016 F350. My bed appeared to already come with a dimple mark for the 4 inch hole, but I checked measurements anyway. Good thing I did because the factory mark was 5/8 inch off toward bumper. Other than that, install was a snap. Took my brother and I 100 minutes start to finish.

I love the clean in-bed look!


The Installation was simple and the video provide step by step instructions. I finished the installation in about four and a half hours in my driveway without the use of a lift. The mount is excellent quality and very sturdy.

2015 Ford F-350 Super Duty

Products I received were the best quality. The sevice from was of the highest standards from time I ordered on line till the parts were delivered, and after delivery they made sure everything was ok.
Thank You! for a great online shopping experence


Works perfect. No issues at all.

Whole system still working well, no rusting or seizing of components. Only issue I have had was one of the bolts on the exhaust lowering bracket came loose, needs a Nylock nut. Other than that, very happy with purchase.
Kevin - 08/16/2021


Great hitch best as far as I am concerned and E trailer also very good to work with always courteous and very helpful


Great fit and installation was accomplished with only one person, although a second set of hands would help.

Brett - 02/24/2019

2015 Ford F-250 Super Duty

All the parts are clean and well made. The install went well. I really like the under bed mounting instead of the rails in the bed that get in the way.

2015 Ford F-350 Super Duty

Arrived in less than a week. took me, alone, about 5 hours to install. Instructions were clear and understandable. Certainly well thought out and designed.


I received my product in three days as expected with no issues. I would highly recommend etrailer!


easy install, great quality...


Was easy to install and is easy to use. I would buy again if I bought another truck.


Show More Reviews

See what our Experts say about this B and W Fifth Wheel Installation Kit

  • Is B&W Gooseneck Hitch Compatible with Rear Airbag Kit on 2012 F-250 Crew Cab Short Box
    The B&W Custom Underbed Installation Kit # BWGNRK1111-5W that fits your 2012 Ford F-250 Crew Cab Short Box installs on the outside surfaces of your frame rails. Any suspension kit that also installs on the outside of the frame will not work, but one that installs inboard or on the bottom of the frame should be compatible. The Airlift kit that fits your truck will depend on whether you have 2WD or 4WD. The linked page will show you all four AirLift rear-axle air bag kits. My contact at...
    view full answer...
  • Are Safety Chains Required for 5th Wheel Trailers
    5th wheel trailers do not require safety chains the way ball hitches like goosenecks do. Chains are only needed on ball-type couplers like standard receiver hitches and goosenecks. Since a 5th wheel connects at a king pin rather than a ball no chains are needed. Gooseneck hitches like # BWGNRK1111-5W include safety chain loops but 5th wheel hitches do not.
    view full answer...
  • What is the DIfference in The B&W Goosenecks Part # BWGNRK1111 and BWGNRK1108
    The difference in the B&W Turnoverball Underbed Gooseneck Trailer Hitch w/ Custom Installation Kit part # BWGNRK1108 and part # BWGNRK1111 is what vehicles they fit. Part # BWGNRK1108 is designed for the 1999-2010 Ford F-250, F-350 and F-450's and part # BWGNRK1111 is designed for the 2011-2016 Ford F-250, F-350 and F-450's without the OEM Prep Package. Both are designed with the same center section and can be paired with the B&W companion Fifth Wheel with part # BWGNRK1108-5W and part...
    view full answer...
  • Fifth Wheel Recommendation For 2015 Ford F-150 With 8 Ft Bed
    The B and W Fifth Wheel we offer for your 2015 Ford F-450 Dually, is designed to be used with their own custom installation kit and will unfortunately not work with another manufacturer's system. The custom installation kit I recommend is the B and W Fifth Wheel Installation Kit, part # BWGNRK1111-5W. This kit doubles as a gooseneck hitch when the fifth wheel is removed. This system comes with the rails, gooseneck hitch head, the chain loops and a hitch ball. This is an easy installation...
    view full answer...
  • B and W Companion 5th Wheel Hitch and Rail Kit Recommendation for a 2015 Ford F-450 Super Duty
    Yes, the B&W Companion 5th Wheel Trailer Hitch # BWRVK3500-5W and the Custom Underbed Installation Kit # BWGNRK1111-5W that you referenced are both confirmed to fit your 2015 Ford-F450. I attached an install video for these parts on a similar truck for you to check out.
    view full answer...
  • Need Access to Truck Bed When Im Not Towing which is better Gooseneck or 5th Wheel?
    Gooseneck trailers are primarily commercially used, while 5th Wheels are primarily used recreationally. Goosenecks come in a variety of styles, some hitch balls are fixed, while others are detachable so you can remove from the bed or change it the ball out to a different size. We even have gooseneck balls that fold down into the bed of the truck, to provide more clearance when the gooseneck is not in use. In some states passengers are not allowed to ride in the trailer if being towed by...
    view full answer...
  • 2014 Super Duty 5th Wheel Hitch Recommendation Towing Heartland Trailer with 88 Degree Nose
    The trailer you are purchasing is the reason you wouldn't need a slider hitch. The Heartland with the 88 degree nose is designed so that a shortbed truck like yours 2014 Ford F-250 can make a 88 degree turn without the use of a slider. Your towing capacities are still what the owners manual of your truck states. Suspension enhancement is great as it allow the truck to tow the capacities in a safer manner, but it does not give additional capacity. The B and W setup you are considering...
    view full answer...
  • Tow Capacity for a 2014 Ford F-350 with Gas Engine and Fifth Wheel Trailer Hitch Recommendation
    I looked up your vehicle and was able to come up with two different 5th wheel trailer towing capacities you could have. If you have a 3.73 gear rear end you would have the capacity for a 12,200 lb trailer. If you have the 4.10 gear rear end you would have the capacity for a 15,600 lb trailer. You will be able to determine the gear ratio of the rear end by checking the VIN number plate in the door. For a fifth wheel trailer setup that will work well for you and will give you total bed...
    view full answer...
  • Best Fifth Wheel Hitch Recommendation for 2011 Ford F-350 with B and W Turnover Gooseneck Hitch
    For your 2011 Ford F-350 that has a B and W Turnover Gooseneck hitch installed already you have a couple options, but the absolute best solution is to install a B and W Companion Hitch # BWRVK3500-5W. This hitch was designed to fit the gooseneck hitch you already have installed and since most consider the nicest fifth wheel hitch on the market it would be the best recommendation I can make for you. This will fit right into your hitch easily and will work very well. Check out the review...
    view full answer...
  • Footprint of B&W Companion Slider Hitch in 2014 Ford F-250, 6-3/4 Foot Bed
    The overall dimension of the B&W Companion 5th Wheel Trailer Hitch with Slider # BWRVK3400-5W is 45 inches long x 34-3/8 inches wide. For your 2014 Ford F-250 with 6-3/4 foot bed, you will have approximately 20 inches between the front (cab-side) of the truck bed and hitch, and approximately 16 inches between the tailgate and end of the hitch. I have attached a photo of the # BWRVK3400-5W in a truck bed with these measurements shown for you. The angle of this photo distorts these measurements....
    view full answer...
    Image 1 for
  • Fifth Wheel Towing Setup Recommendation for 2016 Ford F-250 For Bed Access When Not Towing
    We have just what you are looking for. The B and W Companion hitches like the part # BWRVK3400-5W are great because they install in a gooseneck hitch ball hole instead of into large rails that would obstruct the bed of your truck when not towing. The part # BWRVK3400-5W is a slider hitch which is what your 2016 Ford F-250 short bed would need to give you the needed clearance to make tight turns. The correct rail kit you would need is the part # BWGNRK1111-5W. What's nice about this route...
    view full answer...
  • B and W Companion Fifth Wheel Hitch Setup Recommendation for a 2016 Ford F-250 Short Bed
    For the 2016 Ford F-250 short bed you would be able to get by without having to use a Reese Revolution/Sidewinder. You would just have to use a slider fifth wheel hitch to give you the turning clearance needed. If the truck bed was shorter than 6 feet you would need the Sidewinder but for a 6-3/4 foot bed the slider will work fine. For that you would want the Slider Companion part # BWRVK3400-5W and then the rail kit part # BWGNRK1111-5W.
    view full answer...
  • Fifth Wheel Hitch Recommendation for 2012 Ford F-250 Short Bed
    For your 2012 Ford F-250 the B and W fifth wheel setup would be what we recommend. This is the nicest hitch on the market as most would say so we recommend it very highly. Since you have a short bed truck you do have to go with a slider hitch so that you have turning clearance. That means that for a hitch you would need the part # BWRVK3400-5W and then for the rail kit you would need the part # BWGNRK1111-5W. This hitch has a 20k towing capacity so it would be great in that regard as well.
    view full answer...
  • Slider Hitch Recommendation for 2016 Ford F-350 with B and W Turnoverball Hitch Installed
    Since you have a short bed truck you would need a slider hitch to allow you the needed turning clearance. Since you have a B and W Turnoverball hitch # BWGNRK1111-5W the hitch you would need is the slider Companion part # BWRVK3400-5W which slides back to allow turning clearance. The Companion hitches are considered by most in the RV world as the nicest hitches around so I would recommend this hitch highly. I attached a review video for this for you to check out as well that shows the...
    view full answer...
  • Slider Fifth Wheel Hitch Recommendation for 2015 Ford F-250 with B and W Gooseneck Hitch
    If you have a 2015 Ford F-250 with a B and W Turnoverball hitch part # BWGNRK1111-5W installed all you need is the Slider Companion Hitch part # BWRVK3400-5W which will give you the turning clearance you need and will easily fit the gooseneck hitch you have. Without a slider (since your truck bed is short) you wouldn't be able to make tight turns without the cab of the truck wanting to come in to contact with the trailer. The slider allows the hitch the needed clearance. Your bed length...
    view full answer...
  • BWRVK3400-5W Measurement From Hitch Post to Cab
    The B&W Companion # BWRVK3400-5W measures 15" from hitch post to furthest part of the front (or cab-side) of the hitch; so you have 5" of space to work with. The Companion is considered by many to be the single best option for a fifth wheel hitch, and for evidence you can take a look at the over 350 reviews on our site; almost all of which are 5 stars. Since you have the Turnoverball BWGNRK1111-5W already installed in your 2014 Ford F-350, you will not need any other parts to use this...
    view full answer...
    Image 1 for
  • Recommended 5th Wheel Hitch for 2014 Ford F-250 Short Bed
    I recommend using the B&W Companion # BWRVK3400-5W and underbed kit # BWGNRK1111-5W because it's got a little bit higher capacity than the other two hitches you mentioned, which is important since you haven't bought a trailer yet, and the B&W Companion has a dual jaw as opposed to the single jaw heads of the others. At the end of the day, a dual jaw head is going to provide you with better contact with the trailer's king pin, which leads to less rattle and better security when towing-it's...
    view full answer...
  • Is Sliding B&W Companion Needed For Short Bed 2012 Ford F-250 Super Duty
    Yes, you will need the sliding version of the Companion for your short bed 2012 Ford F-250 Super Duty in order to make sure your 5th wheel trailer doesn't crash into your cab when making sharp turns. The correct part number that will work with the Turnoverball # BWGNRK1111-5W on your truck is the following: - B&W Companion 5th Wheel Trailer Hitch w/ Slider # BWRVK3400-5W
    view full answer...
  • Which Air Bag Suspension Kit is a Fit for 2013 Ford F-250 with B and W Gooseneck Hitch Installed
    The great thing about the Firestone air bag kits like the part # F2597 that you mentioned is that they are designed specifically to fit trucks that have in bed hitches like the B and W part # BWGNRK1111-5W which is a fit for your 2013 Ford F-250.
    view full answer...
  • 5th Wheel and Gooseneck Trailer Hitch for a 2016 Ford F-450 Super Duty Long Bed
    I have the perfect set up for you to add a 5th wheel and gooseneck hitch to your 2016 Ford F-450 long bed. First, you will need gooseneck trailer hitch and installation kit # BWGNRK1111-5W from B&W. Not only is this a gooseneck hitch from one of the leaders in the industry it is also the base for the Companion 5th wheel trailer hitch # BWRVK3500-5W. This is the ideal set up for towing both gooseneck and 5th wheel trailers! And to add an in-bed 7-Way trailer connector to make hooking...
    view full answer...
  • Towing Capacity and 5th Wheel Hitch Recommendation for 2016 Ford F-350 6.7 Diesel 4x4 Crew Cab
    According to Ford's Towing Guide, the 2016 Ford F-350 Super Duty with the 6.7 Diesel engine, Crew Cab, 4x4 has a maximum 5th wheel/Gooseneck towing capacity of 15,700 lbs for single rear wheel trucks. For dual rear wheel drive trucks, it's between 23,500 and 26,500 depending on the axle ratio. If you're in the market for a 5th wheel hitch, I recommend the B&W Companion # BWRVK3400-5W for a short bed, or # BWRVK3500-5W if you have a long bed, along with the custom installation kit # BWGNRK1111-5W....
    view full answer...
  • Availability of Fixed 5th Wheel Hitch for 2016 Ford F-250 Short Bed
    It sounds like you would like to install the Custom Underbed Installation Kit for B&W Companion 5th Wheel Trailer Hitches # BWGNRK1111-5W on your 2016 F-250 short bed to use a B&W Companion. The reason you are seeing the # BWRVK3400-5W is because you have the 6-3/4 bed. This is typically what is recommended to ensure that you have enough clearance with turning on the short bed model. Assuming you have a tapered nose on your 5th wheel that allows for short bed clearance, or a pivoting pin...
    view full answer...
  • 5th Wheel Hitch With Gooseneck Capabilities For A 2014 Ford F-350
    For your 2014 Ford F-350 you'll have a couple of options. Depending on what size bed you have will determine the best application. If you have the short bed truck, you're going to need a sliding 5th wheel hitch the B&W Companion # BWRVK3400-5W with the under-bed mounting kit # BWGNRK1111-5W will work great for you. This hitch will slide 12" front to back to give you the additional clearance needed when making tight turns. When not in use, the hitch can be removed to expose a gooseneck...
    view full answer...
  • Best B and W Hitch and Rail Kit Recommendation for a 2013 Ford F-250 Super Duty with Short Bed
    Yes the hitch and rail kit you referenced would technically fit your 2013 Ford F-250 SD with a short bed, but since you have a short bed truck you would want a slider hitch instead of the B&W Companion Gooseneck-to-5th-Wheel Trailer Hitch # BWRVK3500 so that you can make tight turns otherwise the cab of your truck would interfere with the trailer preventing you from making any tight turns. For that you would want the slider version of this hitch part # BWRVK3400-5W. Check out the review...
    view full answer...

< Previous

Do you have a question about this Fifth Wheel Installation Kit?

  • Why

    At we guarantee:
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate fifth wheel installation kit information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Lindsey S
Written by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Joshua S
Video Edited:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
Employee Kathleen M
Video Edited:
Kathleen M
Employee Chris R
Video Edited:
Chris R
Employee Laura H
Updated by:
Laura H
Employee Kristina F
Updated by:
Kristina F
Employee Noah M
Updated by:
Noah M
Employee Randy B
Test Fit:
Randy B
Employee Robert C
Test Fit:
Robert C

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.

Product Experts Available Now!
Call 1-833-496-1390