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Roadmaster Universal Hy-Power Diode Wiring Kit

Item # RM-154

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Tow Bar Wiring

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RM-154 - Diode Kit Roadmaster Splices into Vehicle Wiring
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RM-154 - Diode Kit Roadmaster Splices into Vehicle Wiring
Roadmaster Tail Light Mount Tow Bar Wiring - RM-154
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Tow Bar Wiring RM-154 - Universal - Roadmaster

In Use/Installed

RM-154 - Diode Kit Roadmaster Splices into Vehicle Wiring on 2014 Ford Fiesta
Roadmaster Universal Hy-Power Diode Wiring Kit Universal RM-154 on 2014 Ford Fiesta
RM-154 - Tail Light Mount Roadmaster Splices into Vehicle Wiring on 2014 Ford Fiesta
Roadmaster Universal Tow Bar Wiring - RM-154 on 2014 Ford Fiesta
Roadmaster Splices into Vehicle Wiring - RM-154 on 2014 Ford Fiesta

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  • Diode Kit
  • Splices into Vehicle Wiring
  • Roadmaster
  • Tail Light Mount
  • Universal
The best technical support and full tow bar wiring installation instructions. Lowest price Fiesta tow bar wiring guarantee and expert service. Ford Fiesta, 2012 tow bar wiring by Roadmaster are available from etrailer.com. For expert service call 800-298-8924 to order your Roadmaster Universal Hy-Power Diode Wiring Kit part number RM-154, or order online at etrailer.com.


  • All Info
  • Reviews (169)
  • Q & A (643)
  • Videos (55)
  • Photos
  • Why etrailer?

2012 Ford Fiesta - Roadmaster Universal Hy-Power Diode Wiring Kit

Diode Kit allows you to use your Ford Fiesta's tail lights and wiring system while preventing feedback from your RV. 4-Pole flat loop included to connect RV to towed car.


Features:

  • Connects your RV's tail, brake and turn signal lights to your towed car's lighting system
  • Works with 2-wire and 3-wire lighting systems
    • 2-Wire systems (aka combined) have the stop and turn signal sent along the same wire
    • 3-Wire systems (aka separated) have the stop and turn signals sent along different wires (typically indicated by amber turn signals)
  • Prevents electrical feedback and the damage it can cause to your Ford Fiesta's electrical components
  • Kit includes:
    • (4) Hy-Power diodes
    • Molded 4-wire electrical cords - 30' long
    • Power cord - 6' long
    • 4-Way flat wire connectors for both the Ford Fiesta and RV
      • If RV has a 3-wire system (and is not already wired for a trailer connector) a converter is required (RM-732 - sold separately)
    • Ring terminal
    • Plastic loom - 3' long


Specs:

  • Max amperage: 85 amps
  • Max voltage: 24 volts


Note: For applications that have separate lighting, this kit will cause your brake lights to function as both brake and turn lights. Wiring converter kit (154-792-118158) can be purchased instead if you want to retain separate turn and brake signals.


Diode Wiring Diagram

Diode Wiring Diagram

Diode Wiring Diagram

Diode Wiring Diagram



154 Roadmaster Universal Wiring Kit with 4 Hy-Power Diodes





Customer Reviews

Roadmaster Universal Hy-Power Diode Wiring Kit - RM-154

Average Customer Rating:  4.7 out of 5 stars   (169 Customer Reviews)

Diode Kit allows you to use your vehicle's tail lights and wiring system while preventing feedback from your RV. 4-Pole flat loop included to connect RV to towed car.

- RM-154

by:


As always great customer service and delivery. I would highly recommend e trailer for all towing needs, and other products they sell. 206606


Comments

I got rid of a dolly to go with towbar, best thing Ive done so much easier to hook up and unhook than a dolly. Great product and great customer service cant beat that plus great prices.

William D - 06/22/2016

18882

- RM-154

by:


I used this for a Jeep Wrangler, probably one of the easier applications. etrailer cautions us to ensure the ground is proper, and I can confirm this. While I found the proper wires using voltage, the gound I used had too much resistance to allow for proper functioning. It took several hours to track it down. But no doubt, when the electical system gives what appears to be impossible data, it is always the ground. I hooked to the proper ground and it works like a charm. I do recommend using heat shrink tubing on the spade connectors. Also I mounted the four flat connector to the bumper. Curt brackets do not fit the connectors in this package without serious modifications. 192669



- RM-154

by:


I have not installed it yet but think it will be ok for what I am l needing. 223019


Comments

Works like a charm. Was very easy to install and would buy another one if I ever need one down the road.

wiring k - 08/30/2016

20670

- RM-154

by:


I haven't installed this yet. But I know etrailer video will be of great help. 165408


Comments

So so had trouble with the connecters unplugging from the deodes. Not enough slack on my part

dave t - 12/12/2015

16159

- RM-154

by:


kit arrived on time from etrailer.com. high quality product at a fair price. easy to install on my 2014 f-150. good instructions and diagrams for wiring 150667


Comments

works great

road r - 09/12/2015

14896

- RM-154

by:


Received wiring within 3 days, included instructions and resource phone #s for help if needed. We will use them again when needed. 152248


Comments

Great. No problems.

JOANNE B - 09/20/2015

15111

- RM-154

by:


Work as discribed. The first time for me to use the universal kit and was a little worried about the outcome but I followed the instructions and it works great. The hardest part was routing the wire around the front end area. Wire was just enough, I recommend starting at the front end and route the wire on the passenger side. This is the side of the motorhomes 7 pin plug. Remember to stay away from the exhaust (on most trucks as mine is a Chevy 1500). Product was received within 3 days of purchase which works for me. I give Etrailer 2 thumps up for great service once again. 511182



- RM-154

by:


I installed the wiring harness yesterday and it took about 4 hours. Thats actually 4 hours of work, in reality it was more like 6 hours but most of the time was trying to figure out how to route the wiring which is not the fault of the harness. Everything worked as advertised with no gotchya's or any issues which was really surprising. I installed it on a 2009 Smart fortwo Passion which I am towing behind my motorhome. My advice for anyone using this is take your time, read the directions carefully before you start and follow them step by step and you should have no issues. 281855


Comments

Weve put about 15,000 miles on the MHcar since installing the wiring harness and have no issues what so ever which when towing is a very welcome relief. I am very happy with your product and would highly recommend it.

Dave V - 12/12/2017

31801

- RM-154

by:


Installation was relatively straightforward, and the necessary parts were included in the kit. The installation is not technically difficult, but gaining access to some the wiring was somewhat irritating because of the assembly techniques used in modern vehicles. Be prepared for somewhat tedious digging around to get to the wires, and pull enough slack to work with them. Once again, a few extra plastic automotive fasteners and automotive cable fasteners came in handy. They're available at a decent hardware store or Home Depot-like store. 63823



- RM-154

by:


Great Kit 188494


Comments

Still working great one year later

Jerry R - 04/26/2016

17605

- RM-154

by:


Wired a Chevy Colorado for towing behind a Motorhome. Was using wireless tow lights. Was always a challenge to place the lights on the rear bumper. Plus used untold quantities of batteries. Now just plug & go. Wiring the harness kit was real easy. Just follow step by step instructions. Only deviation was the clips with the kit crimp onto the wires I soldiered after one came lose. After that have had no problems with all the lights working on the vehicle being towed. Should have done this years ago. 485974



- RM-154

by:


Great experience, quick shipping, excellent video and instructional references to go along with the products. I did the installation of the product myself and without the text and instructional video's there is no way I would have been 100% successful. These are the extra value add things that make the difference when shopping with etrailer, I will be a return customer. I am using this product with my 2016 Jeep Wrangler towed by a 2014 Fleetwood Bounder motorhome. 339287



- RM-154

by:


This wiring kit worked marvelously. I'm pretty handy but electrical things can still be a bit scary for me. I got a little help from the good etrailer people, watched a bunch of videos and finally looked at the wiring diagram sent with the kit. Wiring diagrams are not always as straight forward as I would like but this kit has a very good one. I have bought a handful of products from etrailer and consider them to be a cut above. Julie 330979


Comments

The vehicle that I installed the wiring kit in met a tragic death last summer. The new tow vehicle also needed the same wiring kit. The kit is very complete and the instructions are great. Now, think about this........etrailer contacts customers a year later to follow up on their products. Makes you think they actually care about their customers and the products they buy. Almost unheard of in our times.

Julie W - 01/08/2018

32762

- RM-154

by:


Although I am commenting on this product, I actually would like to comment on the following products. I purchased a brake system, tow bar, base plates and wire harness from etrailer. All of my orders were filled in a timely manner. When I reached out for technical assistance, the advisors were readily accessible. All of the products were installed by me. All of the products were very easy to install by using the video and instructions. 337853



- RM-154

by:


I received the product and it was exactly what I had ordered, it was easy enough to install by myself. However, the only thing I would caution future buyers on is knowing both your "towed vehicle" and your "tow" vehicle's lighting system. I was a little thrown off by the instructions and how it referred to "combined" and "seperate" light systems. I'm sure if your going to wire your vehicles yourself you'll figure it out as I did. 22587



- RM-154

by:


Installation on 2018 Kia Soul 486230



- RM-154

by:


This is the 3rd time I've used this wiring harness, I like to trade cars. The first was on a 2008 Pontiac G6 convertible, the 2nd, a 2010 Cadillac SRX, and now, a 2015 Jeep Grand Cherokee Outlander. All 3 were easy to wire and the instructions were VERY helpful! Roadmaster has there stuff together when it comes to RV towing products. And etrailer.com provides great pricing and GREAT support after the sale. 270519


Comments

Still works great! No problems what so ever.

Kerry B - 07/11/2017

25944

- RM-154

by:


You need to be handy and understand how to make your electrical connections secure. Follow the instructions (view the online video, helps) and all will be fine. This installation makes the towing process much easier than hanging lights on the towed vehicle. Install it..........plug it in to the towed vehicle, and the motorhome and you are done with the lights. Good way to go. 338467


Comments

No issues observed. System works great!

Skip A - 02/03/2018

34177

- RM-154

by:


Hard to give a review...Just received the product today, but must say the service, packaging, and price were all great. Installing the RM 154 should not be a problem for me and the great thing is I ordered two kits, one for myself, that I'll install first and so the second one for a friend should be a cake walk install. Both installs will be on GMC Canyon PUs. 211769



- RM-154

by:


Universal wiring harness for 2011 Ford taurus arrive super fast and well packaged. I would have liked a kit with 'plug and play' wiring for the Taurus but was not available. I installed one on a 06 HHR and was very impressed. Not so sure about cutting and splicing wiring harnessed an a 2911 Taurus.....find out tomorrow when the job is tackled....Bob 308420



- RM-154

by:


Installed this product in a 2015 Jeep Wrangler Unlimited. Installation was a breeze and the instructions were clear and simple to follow. For testing, I pulled the jeep behind our Suburban while my wife verified everything was working as designed. One year and several thousand miles later, everything is still working fine. 257388



- RM-154

by:


Installation was accomplished with good instructions. One thing to watch during installation is shorting-out due to cross-wiring. I blew a fuse and was stumped for awhile why lights didn't work as advertised. It was my problem, but replacing the fuse solved it. I enjoy how the lights work without using toad-vehicle battery. 460635



- RM-154

by:


Received the order in 4days. Took about 4hours to install on my 2012 Toyota Prius. Most of the time was routing the wording from the front of the vehicle (a function of the vehicle not the wiring. Had to install some jumpers as there was not enough slack in the vehicle wires ti put the diodes in. Excellent product. 188344



- RM-154

by:


Universal wiring kit was very easy to install did date me no time at all to install it and it works great and I'm very pleased with it I appreciate your guyses products and I am very happy and work like they're supposed to all of your product that I have installed on my vehicle 05 Dodge Durango thank you 259712



- RM-154

by:


Bought the universal kit and it arrived in a few days, the directions were great as were the Picts. My few questions were answered right away, now a year lTer I switched cars and called support, they helped me again even though I didn't have to purchase anything further. I would recommend them any day. 426119



- RM-154

by:


Product arrived on time and the installation instructions were very good. An easy install and the lights on my Kia Soul work with the motor home as they should. Zero problems......recommend the RM-154 kit. Ed Sievers in Denver, CO 2007 WGO Outlook 31-C and Kia Soul with 6-speed DIY transmission. 355656



- RM-154

by:


Everything I needed was included. Had the help of an experienced friend, took a little over 2 hours. 326728



- RM-154

by:


Takes time to install wiring from the front of the dinghy vehicle. Easy to install diodes if you follow the Etrailer video and follow the instructions. Probably took me a couple of hours to install due to laying under the truck to route the wiring from the front to the connection to the coach. 276887



- RM-154

by:


Product arrived on time, and was fairly easy to install. I only spent about 6 hours involved in the installation of the wiring, primarly because I am very particular in routing the wires and shrink wrapping the connections. I highly recommend this product for wiring a vehicle up to be towed. 416742



- RM-154

by:


The Universal Hy-Power Diode Wiring Kit contains all that is necessary for installation. It was installed in less than a day and works fine. etrailer is a good company to work with, always ships promptly, and is good at keeping the customer informed of status. 131808


Comments

Don who installed it for you

-- comment by: Andy B - 08/05/2014

6080

- RM-154

by:


I did not like this wiring setup. I cut both ends off because the silly bracket they supplied would not hold the rubber mounted flat wire connector firmly. I bought a 4 wire round connector and used that. I am not sure why they don't make a plug and play harness like used on the JK 419512


Comments

they work great. I changed to a 2018 Jeep Grand Cherokee and had the dealer switch over. Still work perfectly. Using them again in Oct.

Steve F - 08/15/2018

42354

- RM-154

by:


This was a much easier install than the Mopar kit that was defective. I received a refund on the "factory" kit and installed this one in half the time. I had to add pig tails to this kit on the right side so this isn't perfect but I had the extra wire and connectors and it was easy. 366728



- RM-154

by:


I recently ordered a diode wiring kit for my tow behind GMC Sierra Z71. I used economy shipping and it still arrived in 3 days. The best thing about etrailer site was the installation video. I watched it several times and the installation went like clockwork. Thanks etrailer. 158513



- RM-154

by:


Product was exactly as ordered. Ordered this item for installation on an '09 HHR to be towed behind our Motor Home. It will eliminate alot of potential lighting problems and appears to be simple to install. Shipping was VERY prompt and I will use "etrailer" again, I'm sure. 29364



- RM-154

by:


We put this product on our 2015 jeep Cherokee to enable us to tow it behind our Monaco dynasty motorhome! First of all it was easy to install and has not given us one lick of trouble ! I would recommend this company and its products to any and all of my friends ,! 239116



- RM-154

by:


everything went well except i was told that i did not need the brake relay kit and i do. We got it wired ready to leave to go back home and found out we did need the brake relay and when i called to order it they were out of stock so delayed our trip. 540131



- RM-154

by:


First, I'm impressed by the way Etrailer does business (service, quality, quick shipping, communications etc). As for the kit, it has everything needed to setup your car so it can be towed. In fact, it had more than what was needed for my 1998 RAV4. 82345



- RM-154

by:


Running wire to back of vehicle a bit of a challenge and wires on vehicle had to be lengthened after cutting to facilitate installation without removing all of inside of vehicle paneling. Works as designed after installation. 5 plus hours. 144719



- RM-154

by:


Product works as advertised. Have had no problems with lights working properly. Front plug is out of sight when not in use. Another foot or two of wiring would give more installation routing options on the inside of vehicle. 471627



- RM-154

by:


This super simple wiring harness was just what I needed to rig my Jeep Wrangler for towing behind our RV. One year later, still going strong. I'm a big fan of etrailer. Great customer service, quick shipping and follow up. 455715



- RM-154

by:


watching the viedo makes instaliton a snap Great product, the Hy-power diode make worth the exter $ The T-one harness is real easy to install The mounting brackets for the 4 pole flat makes for a clean looking install 137341



- RM-154

by:


Pretty nice package with just the right amount of wiring and pieces. Simple and straight forward installation on my 2011 Jeep Grand Cherokee Limited 4wd. It will be flat towed behind our 2017 Thor Citation 24SS. Thanks! 329393



- RM-154

by:


Installed ok except, the wiring connectors are junk. I went out and purchased 20 quality crimp-on connectors to do the job. Funny thing is that a good connection is essential to having success installing this product. 40395



- RM-154

by:


The wiring kit did exactly as advertised. soooo much easier than buying wire and diodes and doing it yourself. The fact that the 4 wires are molded together make it much easier. The wiring diagrams were excellent. 135404



- RM-154

by:


GREAT PRODUCT !! ETRAILER MADE IT EASY ,EVERYTHING IS THERE TO DO A PROFESSIONAL INSTALL, A VERY KNOWLEDGBLE CUSTOMER SERVICE WILL ANSWER ALL CONCERNS YOU MAY HAVE , HIGHLY RECOMMEND . BUY WITH CONFIDENCE. 210222



- RM-154

by:


If your towing a car or truck behind your motorhome, or coach. This is what the doctor ordered. Is a excellent product made very well and quick and simple. Hook up your tow bar and plug in the light cord. 95018



- RM-154

by:


Excellent product with easy to follow instructions As always - etrailer has great products, fair prices, and the best customer service of any online retailer. Keep up the great service!! Dave 20295



- RM-154

by:


Received a Roadmaster Universal HY-Power Diode Wiring Kit-RM-154. It arrived as described and I installed it without any problems. I would recommend this product and this company. 227406



- RM-154

by:


It was amazing experience dealing with sales, very helpful, amazing delivery service and best of all was the product was so easy to install. Thank you very much Etrailer Jack 313546



- RM-154

by:


The Roadmaster Universal Hy-Power Diode Kit was a bit harder to install then I thought it would be, but well worth the time to install. It works great and I glad I ordered it. 471441


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Do you have a question about this Tow Bar Wiring?


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  • Parts Needed to Flat Tow a 2013 Jeep Wrangler Unlimited Behind a Motor Home
  • From what I have found the 2013 Jeep Wrangler Unlimited does NOT need to have fuses pulled to flat tow it. This means you will not need a fuse bypass. Consult the owners manual to confirm this and for other specific information on flat towing your Jeep. There are other items needed to flat tow your Jeep: base plates, tow bar, safety cables, lighting, and supplemental braking. For base plates I recommend the Roadmaster XL base plates # 1439-1. These base plates will fit without an...
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  • Flat towing your 2018 Subaru Crosstrek behind your Winnebago View motorhome requires essentially the same items you used for towing your older Honda vehicle. Those basic components for flat towing include a tow bar, such as your existing Blue Ox Alpha # BX7365, base plates and a braking system for the toad, safety cables, a high/low hitch adapter, and a wiring or lighting kit of some type to keep the towed car visible. All are touched on in the linked article on flat towing. At this...
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  • Parts Needed to Flat Tow 2015 Ford F-150 Behind Motorhome
  • Safe and legal flat towing of a vehicle behind a motorhome requires several components. The linked article that describes each of these is a great place for you to start. I also linked articles on high/low hitch adapters and braking systems in case you care to get into more detail on those items. I suggest the Blue Ox base plate kit # BX2671 along with their Alpha tow bar # BX7365, which includes the required safety cables. For a lighting kit you can use a diode kit like # RM-154 for...
    view full answer...

  • Can a 2017 Ford Fiesta be Flat Towed With 200 Miles on it and Recommended Parts Needed to Flat Tow
  • I checked an online version of the owner's manual about flat towing for your 2017 Ford Fiesta and although I didn't find anything in there about a mileage requirement before flat towing, it is good practice to get at least 500 miles on a new vehicle before doing anything to or with it. This gives the vehicle a chance to break-in. The manual does say to put about 300 miles on new tires so I recommend going on a little road trip before flat towing your Fiesta. To flat tow your Fiesta you...
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  • Will Tow Ready Adjustable Tow Bar # 63180 Work With Roadmaster XL Base Plates on 1999 Chevy Tracker
  • I would first recommend to check your owners manual or check with Chevrolet regarding any guidelines or modifications that might be necessary to flat tow your 1999 Chevrolet Tracker. Some vehicles require modifications such as a drive line disconnect, transmission lube pump, freewheeling hubs or axle disconnects. To use the Tow Ready Adjustable Tow Bar, part # 63180, on the Roadmaster XL base plates you will need to use the Roadmaster Base Plate to Tow Ready Tow Bar Adapter, part # RM-025,...
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  • Parts Needed to Flat Tow a 2015 Jeep Cherokee Trail Hawk
  • We have everything you would need to flat tow your 2015 Jeep Cherokee Trail Hawk behind your motorhome. First you will need a base plate kit, which for that I would recommend the Roadmaster Base Plate kit part # RM-521446-4. In addition to the base plates, you will also need a compatible tow bar, safety cables, lighting, and supplemental braking to flat tow your vehicle. The most popular compatible tow bar is the Falcon 2, # RM-520 . For safety cables you can use # RM-643 . The coiled...
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  • Parts Recommendation for Flat Towing a 2014 Fiat 500L
  • I pulled up a copy of the owners manual for a 2014 Fiat 500L and found that the manual transmission vehicles are okay to flat tow as long as you put the vehicle in neutral. You need to check your owners manual to double check this. The first component you will need to flat tow your vehicle is a base plate kit. For that I would recommend the Roadmaster Base Plates # RM-522014-5. In addition to the base plates, you will also need a compatible tow bar, safety cables, lighting, and supplemental...
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  • Parts Needed to Flat Tow a 1985 Jeep CJ-7 Wrangler
  • In order to flat tow a vehicle you will need to install base plates first so the tow bar has something to attach to. For a 1985 Jeep CJ-7, you will need to use Blue Ox base plates, # BX88230. These will actually bolt to the bumper. They need to be bolted to a flat surface on the bumper and in most cases, the bumper will need to be modified and reinforced to tow the vehicle. You can then use the Adventurer tow bar, # BX7322 that you referenced. Make sure the base plates are spaced 16...
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Info for this part was:

Test Fit:
Joe V
Expert Research:
Michael L
Video Edited:
Zack K
Expert Research:
Sarah L
Video by:
Andrew K
Updated by:
Lindsey S
Expert Research:
Robert G
Expert Research:
Patrick B
Expert Research:
Michael H
Expert Research:
Jeff D
Expert Research:
Reno H
Expert Research:
Jameson C
Video Edited:
Joshua S
Test Fit:
Nicholas E
Video Edited:
Jacob T
Test Fit:
Rick A
Expert Research:
John H
Video Edited:
Andrew L
Expert Research:
Adam R
Video Edited:
Kathleen M
Video Edited:
Mike H
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Dustin K
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Shane T
Expert Research:
Rachael H
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Jeffrey L
Video by:
Alan C
Video Edited:
Sue W
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Randy B
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Chris R
Photos by:
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Updated by:
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Test Fit:
Jared G
Video by:
Zach D
Test Fit:
Andrew S
Test Fit:
Brent H
Test Fit:
Shane H
Test Fit:
Robert C
Updated by:
Hannah L
Video by:
Michael B

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