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Diabolical Inc Slipstream Secure Cover System (07-18 Jeep Wrangler JK 4 Door)

ExtremeTerrain no longer carries the Diabolical Inc Slipstream Secure Cover System (07-18 Jeep Wrangler JK 4 Door). Please check out 2007-2018 JK Jeep Wrangler Rear Cargo Storage for an updated selection.

Features, Video & Details

  • Rugged Steel Construction
  • Black Powdercoat Finish
  • Removal Lift Panel
  • 4 Quick Release Pins
  • Tailgate-Only Accessibility
  • Store up to 200 lbs On Top Safely
  • Designed for 2007-2018 Jeep Wrangler JK 4-Door Models

Review & Installation Video

Review & Install Video

I'm Ryan from and this is my review and installation of the Slipstream Secure Cover System, fitting all 2007 and up JKs. There is a version of this available for those of you with a 2007 to 2010 JK and those of you with the 11 and up, so make sure you get the right one for your Jeep. Today we're going to talk through the installation of this system as well as the construction and a few of the features. If you have a four-door JK and you want to be able to store items behind your rear seat in the trunk area of your JK while keeping them safe from both prying eyes and anybody who might want to grab them, this system is a great option. Whether you have a hard top or a soft top, securing that area behind the rear seat is going to be easy with this system. Now, this system is built a lot better than a lot of the other systems I've seen from the security aspect to the build quality and the finish quality. However, all of that means that this is also going to be slightly more expensive than some of the competition. There are a few different rear cargo area security solutions available on the market. Some of them have hinged tops which can make it a little bit more convenient to get in and out of that area. However, that also leads to one additional point that somebody who wants to get into your cargo area could more easily break in. This system does not have any hinges. The top panel only lifts up by removing the pins that are only accessible through opening up the tailgate which, of course, will lock. This also has wings that cover the area from the cargo space to the outside of the tub right where the roll cage will come through the tub so that keeps anybody from being able to pry underneath and pop the top off. So the fact that this doesn't have any hinges, it doesn't have any accessible latches from the outside, only from within the tailgate, and the fact that this doesn't use any hardware that has an exposed head on the outside of it, it only uses carriage bolts so there's no way that you can grab that and spin it from the outside mean that this is very, very secure. You combine that with the high build quality and the high strength of all of these materials and it means you have an impenetrable rear cargo area when you install this system. It also has an area up top where you can store additional cargo up to 250 pounds and it has a system for strapping down that cargo whether you want to use a ratchet strap, a bungee cord, or an elastic net. That feature of being able to store things on top of your cargo deck lid means that you have some additional storage, and that's also something that sets this apart from some of the other systems on the market. Because this is very well built, because it's high quality materials, and all of the additional bends for additional strength mean that you have a 250-pound weight capacity on top of the cargo cover where some of the other versions of this system on the market do not. I'm going to give this installation a one out of three wrenches. It is a little bit involved only because there are a few different pieces and there is a good bit of hardware but there's no cutting. Of course, there's no wiring. So, overall, the installation is going to be very simple, although it may be a little bit time consuming. I would give yourself a solid two hours to get this installed in your Jeep. Now, the first step of the installation is to install the front portion that goes directly behind the rear seats. In order to do that, you will have to loosen up the seat brackets to slide the brackets that come with this kit underneath and then tighten them down again. After that, there are some side brackets, there is the top section to install, and then the outside wings. The wings that come with this are, again, very well built like the rest of this system is, even to the point where you were to remove your hard top, you can tuck the wiring in the tube for your rear windshield washer away, and it has a little piece that covers over top of that, keeping everything nice and clean. So to get this installed you are going to just need a traditional set of hand tools, no specialty tools, but do give yourself some time and be sure to read the instructions carefully. I mentioned that there are a couple of different versions of this system available on the market. Tuffy is known for building security products and they do make a rear cargo storage solution, as well as Aries Automotive that make something that's a little bit more akin to this one because it does have the side wings as well. But, as I mentioned, if security is really your main focus, this system is going to have the fewest weak points for somebody who might want to break into it. Along with that comes that higher price tag that we talked about. This is going to be over $100 more than the Aries system and almost $200 more than the Tuffy system. So if security is very, very important to you, if what you're storing inside that cargo area is something that you definitely want to keep secure and you have the budget for it, this system is going to be one of the most secure systems I've seen manufactured. However, if you just want to keep eyes out of the rear cargo area of your Jeep, if you're not as concerned about somebody actively trying to break in, then maybe you can save a little bit of money by going with one of those other systems. So if you're somebody who stores valuables behind the rear seat of your JK in that trunk area and you want to make sure that they stay safe from both prying eyes and anybody who might want to break into your Jeep and grab them, this is a great system to go with. This is more secure than a lot of the other systems on the market that are of a similar design. However, it is going to be a little bit more expensive. So if security is the number one most important thing for you, I would recommend taking a look at this system. So that's my review of the Slipstream Secure Cover System available for all 2007 and up JKs that you can find right here at

Secured Storage. The Alterum Secure Cover System offers your 4-Door Wrangler some industrial-strength, secured storage with this unique and innovative steel box solution. Designed to perfectly fit in the trunk area of your Wrangler, this unit offers access through your tailgate. Lock the tailgate, and your box is locked, too. It's a ingeniously simple way of adding some security to your Jeep.

Rugged Steel Construction. The Alterum Secure Cover System by Diabolical, Inc. is constructed of quality steel and comes finished in a sleek black powdercoat. This unit provides great looks with a militaristic design and keeps would-be thieves from snagging valuable equipment out of your Jeep. The Cover System is strong enough to hold up to 200 lbs. atop itself.

Installation. The Alterum Secure Cover System easily installs in your 4-Door Wrangler thanks to a precision fitment. Side wing panels fit tightly around your roll bars and follow the contour of your Jeep's body for a seamless finish. This system is designed for use with the top off, but it can be utilized with the top on.

Application. The Alterum Secure Cover System is designed to fit in 2007-2018 Jeep Wrangler JK 4-Door models.

Fitment: 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 Details

CA Residents: WARNING: Cancer and Reproductive Harm -

What's in the Box
  • (1) Storage System
  • (2) Side Wing Panels
  • (4) Quick Release Pins
  • Mounting Brackets
Installation Info
Tech Specs
Will it fit my Wrangler?

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Questions & Answers (36)

5 Top Rated Questions

With the Jeep top off, can't anyone just unlock the trunk by pressing the 'unlock' button on the door, and gain full access to the trunk by way of the tailgate? Is there a way to disengage the trunk lock from the auto unlock button?

  • Other than disabling the tailgate power locking mechanism, there is no way to prevent access to the Alterum Slipstream Secure Cover System with the top and doors off if you have power locks. This would involve unplugging the lock actuator, or installing a disable switch within its wiring.

Helpful (2)

Hey what do you do about the power tail gate lock when the top is off and you the back security cover on? Because you can reach in and unlock the doors so the tailgate unlocks and you can get into the back.

  • Other than disabling the tailgate power locking mechanism, there is no way to prevent access to the Alterum Slipstream Secure Cover System with the top and doors off if you have power locks.

Helpful (2)

Is this waterproof? Is rain going to get in with a bikini soft top?

  • The Alterum Slipstream Secure Cover System is not waterproof.

Helpful (1)

Is this enclosure waterproof?

  • Thank you for your question! No, the Alterum Slipstream Secure Cover System is not waterproof.

Helpful (1)

Is this product waterproof?

  • Thank you for your question! No, the Alterum Slipstream Secure Cover System is not waterproof.

Helpful (1)
Post Your Question
10 More Questions
Would this work in a 2 door with the rear seats removed, like some rear cargo units? 1 answer
So this system is designed for use with the top off, but it can be utilized with the top on. Hard or soft? 1 answer
How does it effect the subwoofer and sound system?? 1 answer
Will this fit on 2016 JKU with the Best Top Hybrid PRO? 1 answer
Will this fit on a 2016 Unlimited with the Best Top Pro Hybrid top? 1 answer
Will this fit on a 2016 Unlimited with the Best Top Hybrid top? 1 answer
Will this work with a soft ton and rear seat recline kit? 1 answer
Does this storage system have an enclosed back or is it possible to put the seats down and utilize the full length of the jk by sliding items completely through? 1 answer
What is the weight of the product? and what is it made of? 1 answer
Why does it say it doesn’t fit a 2010 JKU Rubicon? What is different from just a JKU? 1 answer

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Customer Reviews (11) Write a Review

Overall Rating 4

out of 5 stars

  • Fit 4.090909 4.1
  • Bang For Your Buck 4.272727 4.3

  • 5/5

    January 29, 2018

    Can't say enough about this product.

    I bought this system for my 2 door. I now leave my jeep anywhere full of tools and I don't have to worry. The installation was straight forward. I would recommend to read the instructions thoroughly before starting. I made a couple of mistakes because I didn't read ahead. Overall it is a sturdy well built product.


    Year: 2012Submodel: Wrangler

    Helpful (3)

  • 1/5

    August 09, 2017

    Doesn't fit as advertised

    After getting the thing put completely together, we could not lock our rear passenger seats in place. The entire box was approximately an inch or so off. Still, trying to figure out whether we are going to try to modify it somehow to fit or just try to return it.


    Year: 2014Submodel: Wrangler

    Helpful (6)

  • 3/5

    July 30, 2017

    Great product difficult to install

    I am a machanical guy but I've never had such a hard time installing anything as much as I did on this Small nuts and bolts is accessibility to tighten some of them was horrible The poster coating seems to be on the thin side It is a 2 person job Once the install was finished it does look good but I would not want to do it again


    Year: 2014Submodel: Rubicon

    Helpful (5)

  • 5/5

    June 22, 2017


    Pretty strong Ana easy to install I recommended it


    Year: 2011Submodel: Wrangler

    Helpful (4)

  • 4/5

    June 19, 2017

    Heavy duty for sure!

    The materials supplied are great quality and I love how it can be broken down for larger cargo with the quick release pins for the top and back panel. My only two complaints are the installation instructions were terrible and the bolts are already getting surface rust.


    Year: 2017Submodel: Wrangler

    Helpful (3)

  • 5/5

    June 13, 2017

    Great looks and utmost security

    The Slipstream is a well thought out product. The fit as well as the functionality is amazing. There are so many possibilities that each person can adjust things to their own taste and purpose. I made mine able to secure the freedom panels along with getting extra storage. Next I'll be mounting speakers and fire extinguishers and I might be done. Awesome job!


    Year: 2015Submodel: Wrangler

    Helpful (4)

  • 4/5

    June 05, 2017

    Good option for a safe trunk

    Had it assembled at the Jeep dealer but some parts did not properly fit, like the "metal" closing over the trunk door. For the rest works fine


    Year: 2015Submodel: Rubicon

    Helpful (4)

  • 4/5

    May 28, 2017

    Great product

    Great product. Install was a pain. Did give me a link to YouTube video but was a different product. Was able to figure it out on my own.


    Year: 2012Submodel: Wrangler

    Helpful (5)

  • 5/5

    May 07, 2017

    Best product out there

    This is extremely secure and love how it works with a soft top, hard top or no top. The instructions that come with it could use a little work. They are detailed, but really need images to go along with them. Make sure to set a side a couple of hours for install.


    Year: 2017Submodel: Wrangler

    Helpful (7)

  • 3/5

    March 20, 2017

    Good end product, pain to install

    I'd love to give this 5 stars, but the packing box was badly damaged, and there were several bent and chipped parts. However nothing that couldn't be bent back into line. Second reason for only 3 stars, the directions for installation are practically useless. There are no photographs, part descriptions are not clear, the orientation of some parts is not described, and final adjustment is not well defined and the center deck section is very tight (probably a good thing). Third reason for just 3 stars; installation is a real pain. Each carriage bolt feeds into "C" channel which makes it very difficult to put on the washer and then thread the lock nut. Some bolts are so cramped that the only way to tighten is with an open ended wrench, and only possible to turn only about 45 degrees at a time. Also, when installing the mounting bracket behind the tailgate latch, it's impossible to get the tailgate to close. I had to cut some plastic away from the molding to allow the bracket to sit back flash where the original spacer was. Now the good. The only fastners that can be removed are the six factory hard top torx head bolts that are used to hold down the wings. There's no way to remove any of the supplied carriage bolts from the outside. Finished installation took a little over 3 hours, primarily due to the inadequate instructions, and the difficulty getting the nuts threaded onto the carriage bolts. The finished product looks very good, appears to be solid and would be very difficult to break into with power tools.


    Year: 2012Submodel: Rubicon

    Helpful (7)

  • 5/5

    March 18, 2017

    Good Cover

    Kind of confusing to install, but after you get past the directions it's an awesome piece of equipment. Super secure, doesn't take too long to put on.


    Year: 2017Submodel: Wrangler

    Helpful (8)

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