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Reese Quick-Install Custom Installation Kit w/ Base Rails for 5th Wheel Trailer Hitches

Reese Quick-Install Custom Installation Kit w/ Base Rails for 5th Wheel Trailer Hitches

Our Price: $338.81
Fifth Wheel Installation Kit

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Reese Custom - RP50066-58
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Custom brackets reduce the amount of drilling and time required to install your fifth-wheel trailer hitch. Brackets, base rails and hardware included. 1-800-496-5010 to order Reese fifth wheel installation kit part number RP50066-58 or order online at Free expert support on all Reese products. Great prices and Fastest Shipping for Reese Quick-Install Custom Installation Kit w/ Base Rails for 5th Wheel Trailer Hitches. Fifth Wheel Installation Kit reviews from real customers.
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Reese Fifth Wheel Installation Kit

  • Above the Bed
  • Custom
  • Reese

Custom brackets reduce the amount of drilling and time required to install your fifth-wheel trailer hitch. Brackets, base rails and hardware included.


  • Custom brackets mount beneath your truck bed to provide attachment points for 5th-wheel rails
  • Base rails sit in truck bed and allow installation of 5th-wheel trailer hitch
  • Vehicle-specific brackets mount to existing holes in your vehicle's frame
    • Minimizes drilling and measuring
    • Cuts installation time in half when compared with universal bracket systems
    • Compatible with overload springs
  • Kit includes custom brackets, rails and hardware
  • Compatible hitches: B and W Patriot, Curt, Draw-Tite, Hidden Hitch, Reese, Valley and Husky
    • Will not fit Reese Elite Series (Signature Series) or Valley UBS hitches
  • Black powder coat finish resists corrosion
  • 5-Year limited warranty

50066-58 Reese Custom Quick Installation Kit

Item # RP50066-58

Installation Details RP50066-58 Installation instructions

This Product Fits The Following Vehicles

Video of Reese Quick-Install Custom Installation Kit w/ Base Rails for 5th Wheel Trailer Hitches

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

Video Transcript for Fifth Wheel Installation - 2016 Chevrolet Silverado 2500

Today on our 2016 Chevrolet Silverado 2500, we're going to be taking a look at installing the Reese quick install custom base rails and installation kit for fifth wheel trailer hitches, part number RP50066-58. This fifth wheel bed rail system is particularly nice because it fits many different fifth wheel hitches and goose neck adapters. As you can see it's got the different slots for different sizes. It's also got multiple mounting holes so that it can fit different truck set ups and different frame shapes. It's got a nice clean look. It's got this nice black powder coat finish, which is going to help resist that rust and corrosion.

The brackets that are underneath mounted to the frame are custom fit for this trucks frame to make installation a little bit easier and a better fit. It also cuts down on the need for drilling, other than the holes in the bed to mount it to the brackets because you don't have to drill anything through the frame itself. This kit is compatible with overload springs and comes with all the hardware that's needed for the installation of the rails and brackets. To give ourselves a little bit more room to work, we'll remove the wheel for installing the frame brackets. We're also going to lower the spare tire to give ourselves a little bit more access when we're up underneath to mount those bed rails up. First thing we're going to do is take one of our base rails and we'll take it into the back here.

We're going to do the rear one first. We want to measure from the rear lip of your bed there to what is specified in your instructions manual because this kit is compatible with both the six foot six inch beds and the eight foot beds. You'll need to take the correct measurement according to which bed you have. Today we're going to be working with the six foot six inch bed. We'll take our measurement, just kind of get our bed rail set into place.

That looks good right about there. Now we can make sure it's centered by measuring from the seam here on the outside and making sure that those match up. You want to make sure it's centered so that it lines up once you put your frame brackets in place. We're going to take and mark these holes out here. The second one in from the outside edge are going to be our mounting holes on this rear rail. I'm just going to give myself a little mark on the bed.

Then I'll also do it on this rearward facing center hole. Once you've got all five locations marked on this rear bed rail, we'll take an eighth inch drill bit and we're going to drill those out as our pilot holes. In order to make checking the alignment of the holes underneath on the frame rail brackets little bit easier, I'm going to use the fish wires that are provided. I'm just going to stick the end that doesn't have the threads on it down through. I'm do this in all four of the holes on the ends that'll go into the brackets. Just to give you a little bit better idea how well they line up. Now I'll take our frame bracket, which on this you'll want the one going towards the rear to have a little bit more space between the outer part of the bracket and these slotted holes. These two holes are going to line up with those holes, I'll show you here. We'll slide it up there. Then what I'm going to do just to kind of test fitment, is take the carriage bolts that we'll fish through later and put them in through the holes so you're not fighting holding that up there the whole time. It'll kind of stay there and then with those fish wires up there, you'll be able to check your alignment with your holes. You want to just try to line up your fish wires as best you can. Then this side you can see a little bit better than you can on the other side. Now we'll remove our little spare tire heat shield from around the exhaust. That's held up in place by two 13 millimeter bolts. You can take that, set that out of the way. That one's got a 13 millimeter up top on this cross section of frame holding the heat shield in. Now let's move up to the front of the heat shield. We've got one more right here. We've got two more securing locations that are on top of this frame and we'll remove those once we take this frame bracket back out. We'll take these out and take our frame brackets back off. When we're trying to drill the holes out up top, we're not going to damage these brackets at all. We've got two more 13 millimeters, one right here and one right up here for the heat shield. We'll take those off. If you'd like for a little bit more clearance, you can take this inner fender out. Just got a bunch of little torques head screws all the way around here but it's not required. Once we've got that one out, you just got that other one up front here to do. Definitely a little bit of tight space up there on top of the frame. I definitely recommend a ratcheting wrench if you have one. Now with all the high tech points for this heat shield loose, we can just slide it out of there. As you can see that's going to give us much better access to our mounting points for our brackets. Now that we've checked our alignment underneath, let's remove these fish wires that we helped to check that. We can take our nine sixteenths inch drill bit and we can drill these holes out bigger, since they're all lined up. Now we'll take our fish wires and we'll put the threaded in into the holes first and it's these upper holes on the frame. The ones that don't have the threads inside of them. We'll send it through there. There you can see access hole we're going to come out of right there. We'll just kind of pull it down through, put the spacer on, thread the carriage bolt into it and we can go back through. We want to feed that spacer in first. Take it a little bit off the end of the carriage bolt. Feed the space through, then the carriage bolt and come back to the outside, you'll be able to pull it into place. You might have to maneuver it a little bit just to get it to clear everything that's in there and get it to come straight out. Then we can fish our other one through. Now we use these fish wires to help guide our bracket up into place by feeding them from the inside out. Just to make sure that our bolts don't fall back into the frame while doing this and then we got to try and find them. Feed those through, they'll just kind of help guide it up into place. See that fell back in there but we can still pull it back through since we left our fish wire on. Now we can grab our conical tooth washers and the nuts, remove our fish wires. Put the washer on first with those teeth heading in towards the frame. Then get the nut that comes with the kit started. I'm just going to run it down most of the way. Not completely tight but it'll hold this bracket in place and upright, so we can get ready to put the rest of our hardware in place when we go back up top. Now that gives us a little bit of wiggle room for any adjustments. Now we're back up top. What I want to do is, I just want to check to make sure that it looks like the holes are lined up. Those look pretty good. Now what we can do is take our bed rail, put it into place, get these holes lined up. Then we can drop our carriage bolts through. Then we can go back underneath and start tightening some of our fasteners. Now I'm back underneath, you can see we've got the corrugation here. They supply you with these spacers and they slide right up in here. Around the carriage bolts coming through to help give that support between the levels of the corrugation. Those will go on all the carriage bolts and also you've got that center carriage bolt coming down. One goes on that as well. But in order to hold that one up there since there's no bracket, you need to have your lock washer, conical tooth washer and nut all ready. Just kind of finger tighten that down so that it'll hold. In order to help get the nuts and washers on these bolts underneath, little trick to help is lift this up and tighten it down just enough so it holds and won't sag back down. That'll give you a little bit more room on those carriage bolts coming down through the bed. Now we can put our conical tooth washer followed by our lock washer up into place. Then take the nut and get it started. Just going to run it up til it's hand tight, to help hold things in place and we'll get the other carriage bolt. Then we'll do the same thing on the other side. Now you want to grab an extra set of hands, to take the fifth wheel hitch, set it into place. Then with it in place you'll be able to mark your holes. On this front bed rail we'll be using the outermost holes over here on both sides, then the front center hole. Now that we've set in place before I mark my holes, what I'm going to do is I'm going to measure just to try and make sure it's square so that this isn't angled one way or another. In order to do that I'm going to measure from this corner here to the inside corner on the other side of the front rail and then I'm going to measure again to those inside corners where it makes an X. You want those measurements to be the same. That's just about right on. We can mark our holes then drill our pilot holes. Again we'll take our eighth inch bit as our pilot hole. Now underneath with those fish wires sent through you can see that they line up pretty well. You may have to do just a little bit of adjustment front to back but ours are lined up pretty well. We can go back up top and take everything off and drill out our holes. Lift our fifth wheel and pull that rail out of the way so that we can drill our holes out to the nine sixteenths of an inch. Now with our holes all drilled out, we can put our bed rail back into place. Get the holes lined up. Then on this one because you're on the holes that are further out, it's in the low spot of this corrugation we'll be putting these spacers up top here. You can drop your carriage bolts through. On the center here, it's still on the upswing of a corrugation. You'll just be dropping the carriage bolt through and that spacer will go underneath. Now we can go underneath and get the rest of the hardware started. Now we're underneath, you can take conical tooth washer and your lock washer and you want to get them started here on this center one. Once they're started we can take that last spacer like we talked about and slide it up there. Then hand tighten them, then we'll be able to move over to the frame brackets. Take the conical tooth washer, lock washer and then our nut and be sure to do that on both sides. Now a little trick you can use, if these are trying to push up on you when you're trying to put the nut and washers on from the underside. You can put something with a little bit of weight on top of them just to kind of help hold them down into place, so that they don't push up and give you too much of a hard time. Now that we've got all of our nuts started under here, what I'm going to do with these back ones before I tighten them is just to use a screwdriver just o make sure that the spacers that we put in here are seated all the way against those bolts before I start tightening them down. Then I can use my three quarter inch ratcheting wrench and start tightening them down til they're pretty tight so I can torque them. I'll do the same thing on the one in the center. Now that we've got them all fairly tight, let's go around and torque down to what's specified in the instruction manual. We'll do that to all of them. Now that we've got those tight let's come out here, tighten these up. For this be using a fifteen sixteenths. We'll do the same thing on this one. Then we'll do that to both sides. Now that we've got everything tight on our bed rails and frame brackets. Let's take our heat shield and put it back up into position. Then we can reinstall the bolts that came out of it. With that frame bracket being on this side, we may not be able to get all four back in, may be able to get just three. But the shield should be nice and secure with three. We'll get them started, then tighten them down. Then we'll be able to get the one we can access on top of the frame rail. Then we can get this one, which is the third and last one that we'll be able to access with these frame brackets in place. But we can get that one and get it tightened up as well. With that tight lets reinstall our spare tire heat shield. I'm just going to start them by hand. Then tighten them up with a 13 millimeter. Now with that tight, we'll reinstall our rear tires and torque them down to manufacturers specification and reinstall our spare. Once you've got your wheel tight and you've got it back on the ground, don't forget to torque it to manufacturers specs. That's going to complete our look at the Reese quick install custom base rails and installation kit for fifth wheel trailers hitches, part number RP50066-58 on our 2016 Chevrolet Silverado 2500.

Customer Satisfaction Score:

Customer Reviews

Reese Quick-Install Custom Installation Kit w/ Base Rails for 5th Wheel Trailer Hitches - RP50066-58

Average Customer Rating:  4.8 out of 5 stars   (178 Customer Reviews)

Custom brackets reduce the amount of drilling and time required to install your fifth-wheel trailer hitch. Brackets, base rails and hardware included.

2017 Chevrolet Silverado 3500

The installation instructions were detailed and clear. Did it by myself in about 4 hours. Inexpensive solution if you didn't get the 5th wheel prep package.

2011 Chevrolet Silverado

Received the product the very next day shipping was excellent. Boxes were well taped and secured and complete. This was installed on a 2011 Silverado 2500 HD with a 8 foot bed . My installation was straightforward ,followed the included directions , and it installed very easy. I only have two suggestions ,
Get the spare tire down and out-of-the-way and do whatever is necessary to get around the heat shield. I just cut a small section of mine away . I have done business with etrailer for about five years now. I use to price check and order everywhere off the Internet. I don't do that anymore because I always ended up back doing business with
For four reasons ... Best price around, quality products, great customer service from a live person, well packaged products with the fast shipping

2017 Chevrolet Silverado 2500

Installed on 2017 chevy 2500. Square washers for the 5/8 bolts were to big to fit through the acess holes in pickup frame. I had to fish them through a bigger hole further up the frame rail. Other than that, excellent products. Once I found etrailer, its the only place I shop for trailer products


I received my order in a timely manner when I opened the order it was shot a package of hardware I called etrailer they immediately sent me the missing Hardware I'm very satisfied with my order thank you

2016 GMC Sierra 3500

Fast shipping!! Installed on a new 2016 GMC Sierra 3500 Denali. Only issue was the exhaust heat shield.. It must be removed for easier access to install hardware. It takes about 3 hours to install with one person. Otherwise no issues. E Trailer is great to do business with!! Thank you

2015 GMC Sierra 2500

I purchased the Reese dual jaw slider and install bracket kit. Everything arrived in three days in perfect condition. After watching the install video and reviewing the enclosed instructions I installed the assembly myself. It took approximately 4 hours . As you can see I also did additional steps, cutting the rubber bed mat to fit around the rails. Also undercoating the brackets to blend in the wheel wells. Etrailer is definitely the place to go for all your RV needs.


I purchased fifth wheel hitch rails. They were worked great. We certainly put them through a strong test. Unfortunately we got stuck on a very muddy, greasy road on a hunt. The fifth wheel was leaning at an angle but the rails held! I was extremely relieved and happy that they did. Thank you etrailer.

Steve A - 09/17/2020

2019 Chevrolet Silverado 3500

Hi Carol.
I got the package. I hope
to install next week. I’m also looking to put a 5th wheel electrical plug in the bed. 2019 Chevy 3500 with the factory prep for the wiring harness. Do you have a correct fit kit to do this?

We do offer a 5th wheel wiring harness for your 2019 Silverado 3500. Id recommend the Hopkins # 41157
Hopkins Endurance 5th Wheel/Gooseneck 90-Degree Wiring Harness with 7-Pole Plug
, which you can see by using the link provided below. The harness plugs inline right behind the 7-way installed on your trucks rear bumper, between the trucks factory harness and the existing 7-way.
-- Etrailer Expert Mike L - 10/26/2018

2019 GMC Sierra

Rail Mounting kit arrived in perfect condition, with all required attachment hardware and special bolt insertion tool. All items fit up as advertised on my 2019 GMC 2500HD std bed Sierra. Completely satisfied.

After a year since installation and several trips with my 5th wheel, Im still completely satisfied with this rail mounting kit, It has operated perfectly with my Andersen Ultimate Rail Mount Hitch.
Ralph K - 01/09/2021

2019 GMC Sierra 2500

The rail kit installation went smoothly. I did the complete installation alone just to see if I could complete it without any assistance from anyone. (The installation honestly took me about eight hours which included quite a few breaks!) The only difficult task for me was installing the two nuts and washers on the front two bolts on the LH Frame Bracket due to the tight clearance around the large diesel fuel tank on my truck. As some of other folks mentioned, removing the spare tire and exhaust system heat shield are a must for installing the rail kit this model truck. The quality of the components is excellent. My wife and I will be pulling our 5th Wheel to the Georgia Mountains with this hitch this weekend!


Great quality and easy to install, thanks Etrailer!

2016 GMC Yukon

Installed a Reese custom rail kit (RP50066-58) on my 2016 GMC Denali 4WD DRW. It took approximately 3 1/2 hours to get it completely installed. I had to remove the exhaust heat shield and drop the spare tire but once I did it gave me easy access to the hitch frame brackets. I found it very informative to watch the online video first and took the advise of another persons suggestion to tape over the holes in the top of the frame (it kept me from losing the nuts & washers down into the frame). I simply followed the written instructions that came with the kit and the hitch was installed with out any real issues. I will say it did come in handy to have someone to assist me with some parts of the installation (just to keep me from having to crawl in/out from under the truck to get tools etc). As a side note, if you had access to car lift it would make the installation much faster and easier. I didn't have access to one and it was a little tight but as I said it wasn't all that bad.

I would definitely recommend this product.


Almost impossible to reach front bolts under bed to put 2 washer on and then start a nut. Certainly does not leave room to try and torque bolts.


Frame brackets were a perfect fit and easy to install. Installing nuts on the rail's proved a little difficult on my vehicle 2018 GMC due to limited clearance over fuel tank and truck frame and exhaust shield (definitely a 2 person job). Otherwise I am perfectly satisfied with the quality of the kit and easy to follow instructions. I would recommend this kit.

2015 GMC Sierra 2500

Heavy duty rails and install kit. Excellent quality and speed of delivery.

2017 Ram 2500

after getting the right fifth wheel suport kit for my 2017 chevy 2500 hd the insulation went in just as they say in the instructions thanks again etrailer for providing a product and service


An installation of brackets are never easy due to items in the way but following the instructions made it doable

2014 Chevrolet Silverado 3500

Rail kit was great and etrailer was great with fast and free shipping.
Only advice: I installed this kit on my 2014 Chevrolet 3500 and I would not do it again.
I'd spend the extra money and get the RP56001-53 kit...much much easier to install
If you have time and patience, it's worth the savings. Otherwise save yourself the tight quarters of trying to get to those bolts above the frame rails.
I suspect this kit was an earlier design that was or should have been superseded by the later one.


This was a nice product easy to install.
hitch works good the only thing is it is hard to unlock because the jaws are tight. Other than that had no problems.

If the jaws are difficult to unlock, youll want to make sure the hitch has been lubricated according to the operating instructions. Also, if the fifth wheel and the hitch arent both level, the pin box may be applying some force to the jaws, causing them to bind. Moving the vehicle a bit will usually allow the hitch to unbind.
-- Etrailer Expert Mike L - 12/28/2018

2013 GMC Sierra

Although the Rails won't be installed until my new truck comes in mid April, I fully expect the product to be as advertised. I was recommended to your site and product by salesman from major manufacturer of the 5th Wheel Hitch currently used.

Has been a year and Product has worked out just fine !!
ARNOLD - 09/22/2014

2015 Pontiac Trans Sport Van

Kit looks ok and complete, though the packaging was questionable as both were broken open in transport and at risk for loosing parts bags.

2011 GMC Sierra

Excelent product. Made the install much easier than it needed to be. The video helped a lot. Access to some of the bolts were very difficult (ones above the gas tank). Dropping the spare tire made it easier. Biggest problem was removing the heat shield as on my truck the darn Torx screws stripped. I ended up cutting most of the heat shield off. Bottom line, this is a great product, very heavy duty and very versatile.

Still working great.
Jason W - 06/12/2014

2016 Chevrolet Silverado 2500

Excellent product. Installation of washers and nut on front passenger rail under bed a little difficult. Probably worth the extra cost to buy the outboard brackets and longer rails. Removal of spare tire required.

Thanks for your review, Ron. We note that removal or lowering of the spare tire is only temporary.
-- Etrailer Expert Laura E - 11/08/2016

2016 Chevrolet Silverado 3500

These rails were a perfect fit on my previously used 5th wheel hitch. I am installing them myself on my 2016 GMC 3500 Sierra. However, the time it has taken, has been longer than advertised. I am stuck with three unreachable bolts. I am 63 years old with arthritis, so it is a challenge. I am very pleased with the service that e-trailer has provided me on instructions. With them, Installing the rails is a straight forward project even for this rookie. I am not pleased with the box that the rails were shipped in. It was too large a box and the rails tore the box apart. The bag of ten bolts, nuts, washers and spacers was also ripped open. Fortunately all was accounted for.

2015 Chevrolet Silverado

I really appreciated the very informative videos etrailer provided for the install on my 2015 Silverado 2500. I was able to focus my efforts on the high degree of manual dexterity required to mount the rails to my truck without the assistance of a lift. It was a very rewarding experience and I was shocked to learn the positions I could get my aging body into under that truck.
Couple of Tips from me to the next guy:
1) Use electrical tape on lead wire coil and bolt. Too nerve racking pulling on that wire and hoping it wasn't going to yank free of the bolt.
2) When you go to install the washer, lockwasher, nut combination, put a piece of duct tape over the hole in the top of the frame. When (not if) you drop the nut it will bounce off the tape rather than making the nothing but net swishing sound on it's way into your truck frame.

Really solid hitch. I'm very satisfied with the purchase.

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