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Schroth QuickFit Pro Harness - Black (05-17 All)

Item 389991
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    Features, Video & Details

    • 4 Point Removable Harness
    • Ideal for Track and Street Use
    • Compatible with a HANS Device
    • ASM - Anti SubMarining Technology
    • Works with Factory Seat Belt Receptacles
    • 2" Wide Black Polyester Webbing
    • Fits All 2005-2017 Mustangs

    Review & Installation Video

    Review & Install Video

    Hey, everybody. I'm Justin with, and this is my detailed review of the Schroth QuickFit Pro Harness, available in your choice of either black or red, fitting all 2005 and newer Mustangs. You should be checking out the Schroth QuickFit Pro Harness if you're serious about the safety in your daily driven or weekend warrior Mustang and subject it to a good amount of track duty. When I say "track duty" in this case, guys, I'm more talking about the road course stuff or SCCA-type racing, as opposed to all out drag racing. Now, those drag racers might want to entertain the idea of a five or six-point harness, depending on the rules in your respective class. Taking safety even further here, guys, the Schroth QuickFit Pro is actually the first four-point harness of its kind that can be used with a HANS device along with the factory seats. If you aren't aware, HANS stands for head and neck support device, and it's something used in a wide variety of motor sports just to prevent any head or neck injuries in the event of a crash. So again, if you really push the car hard on the track, this is a great option for you guys if you want to make safety a top priority. Now, Schroth has been one of the leaders in aftermarket restraints and harnesses ever since the early '90s. And besides the work they do in the automotive field, also supply stuff for airplanes and helicopters, along with ballistics, seating, and restraints for the military. So essentially, these guys know what they're doing and they're trusted by a lot of people. All right, guys. So the QuickFit Pro is the next generation of Schroth's very popular QuickFit series. This design is very popular, because it's going to integrate into your existing Mustang safety features without the need for anything else. So you don't need an additional harness bar. You don't need a roll cage to use this thing. Basically, it just plugs in or utilizes the factory mounting points of your Mustang seat belt. And again, I think that's what's going to make this very popular to a lot of you guys at home. Here's my one and only nitpick with this mounting system. Now, ideally, you'd like to have the shoulder harness between 0 and 20 degrees downward of the shoulder on a horizontal plane. Usually, using a harness bar, or a lateral bar of a roll cage would be the best way to help you achieve this. Using Schroth's method for the shoulder harness, you're actually approaching the angle of 45 degrees, which is acceptable but not necessarily ideal in my eyes. Again, you never really just want to mount the shoulder harness directly behind the seat to the floor, because that can cause an injury in the event of a crash. Shoulder mounting aside, I really do enjoy how the Schroth integrates into the factory seat belt and restraint system, and here's why. For starters, it's going to silence that seat belt warning chime that you might otherwise hear if you left the seat belt unplugged, for instance, or maybe if you went with a different harness option instead. The Schroth is also going to utilize the factory pre-tensioner system for the lap belt portion, which is pretty cool. Because in the factory system, there's actually a little pyrotechnic device that will ignite in the event of an accident, and that's what tightens up your lap belt in a hurry. The fact that the Schroth is going to reuse that is actually very cool. Sticking with the lap belt portion, guys, the Schroth harness actually incorporates what they call ASM Technology, or Anti-Submarining Technology. That's basically going to help prevent you from sliding or submarining underneath the lap belt portion here in the event of a collision. Now, this might be a concern for some of you guys out there going with a four-point over a five or six-point harness that typically has a belt or belts that come up between the legs, preventing the submarining motion from even occurring. All right, guys. Let's get into the harness here, because there are a few things to talk about. First and foremost, Schroth does offer the QuickFit Pro in both red or black. You can see we have the red here on the table. It does feature two-inch wide polyester webbing, and that's going to be a little bit better than the nylon material when it comes to converting the energy of a crash, or soaking up the energy itself. The Schroth also features a monofilament that's woven laterally into the harness itself, and they say that's going to help better spread the load of the impact over the entire harness. At the mid-$300 price point, the Schroth QuickFit Pro is definitely going to be one of your more premium harness options available here at It's going to cost you about $100 more than the standard QuickFit. But keep in mind, guys, this is the only four-point option currently available that can be used with that HANS device, along with your factory seating, and you're also getting the convenient mounting locations. As I just mentioned, guys, one of the benefits going with the Schroth QuickFit Pro here is that you don't need any extras when getting it installed into your Mustang. No harness bar, no roll cage, no race seats, no modification, and best of all no drilling. Instead, this thing does mount fully into your ride using the existing factory seat belt locations. You will need some basic hand tools to remove some of the factory seat belt stuff, replace it with the Schroth stuff here. But overall, a very simple install, one out of three wrenches on my Overall Difficulty Meter. We call it an hour on the site, but I wouldn't be surprised if it takes you less than that. I feel like the Schroth QuickFit Pro will be a solid option for many Mustang owners out there for the simple reasons that it's easy to install, you don't need anything extra to get it installed, and best of all it's going to provide some extra safety in your street driven or track Mustang, more so if you take advantage of the HANS support. Now, it's tough to put a price on safety. Some people might have a slight issue with the $300 to $400 price tag. But overall, you're getting a solid, well-engineered product that's going to offer you some things other options will not. So be sure to check out a Schroth option for your ride, right here at

    Four Point Removable Harness. A Schroth Quick Fit Pro Four Point Removable Harness is the perfect solution for Mustangs that pull double duty on the street and at the track. The Quick Fit Pro will keep you securely behind the wheel of your Pony while you're carving corners at the track. Then it can be easily removed giving you full access to your interior for people or cargo on the street.

    HANS Device Compatible Schroth's Quick Fit Pro is the world's first 4 point harness that was designed to be used in conjunction with a HANS (Head and Neck Support) Device and your factory seats. Traditional 4 point restraints do not join at a center point, they are sewn to the lap belt leaving almost a 6" to 8" separation between them. The Quick Fit Pro is designed in such a way that both shoulder belts angle in towards the Cam Lock easily facilitating the use a HANS Device.

    ASM Technology. The Schroth Quick Fit Pro features Anti-Submarining (ASM) Technology that positions the lap belt low across the pelvis. This keeps your hips and back side firmly planted in the seat preventing you from sliding under the lap belt in the event of a collision.

    Works with Factory Safety Restraint System. The Schroth Quick Fit Pro works with your Mustangs existing factory seats and safety restraint system allowing for easily installation and removal. The Quick Fit Pro clicks into the car's female seat belt receptacles and anchors to the factory points which are load tested to withstand a 3,000-pound force for 6 seconds. By using the stock seat belt receptacles the vehicle is aware that a person is seated and restrained, silencing the warning chime as well as taking full advantage of the factory seat belt pre-tensioner.

    Polyester Webbing. Schroth's Harness Belts are made from 2" wide polyester webbing. Engineered with “memory effect” Schroth's polyester webbing features special mono filaments laterally woven in, that perform like small leaf springs to keep the webbing flat. This results in better load spreading over the full width of the webbing. Polyester webbing also has a better force/elongation ratio, when compared to standard Polyamide (NYLON®) webbing, so it can convert more energy during an accident.

    Application. This Schroth QuickFit Pro 4-Point Harness is designed to fit all 2005 to 2017 Mustangs with the factory seats and safety restraint system. Including the V6, EcoBoost, GT, Bullitt, BOSS, Shelby GT500 and Shelby GT350 models. Available individually or as a set of two. Please select from the options listed above.

    Fitment: 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Details

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    Driver Side Harness
    • (1) Left Belt
    • (1) Left Side Lap Belt Connector
    • (1) Left Side Tail Strap Connector
    • (2) Reduction Collar
    • (1) SCHROTH ASM Sticker
    • (1) SCHROTH Racing Sticker
    Passenger Side Harness
    • (1) Right Belt
    • (1) Right Side Lap Belt Connector
    • (1) Right Side Tail Strap Connector
    • (2) Reduction Collar
    • (1) SCHROTH ASM Sticker
    • (1) SCHROTH Racing Sticker
    Installation Info

      Customer Photos (4) Submit Your Photo

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        Questions & Answers (12)

        5 Top Rated Questions

        After install, can I still use the factory rear and front seatbelts without reinstalling them? In other words, due both options remain after installation?

        • After installing the Schroth QuickFit Pro Harness's you will still have your factory seat belts installed unless you choose to remove them.

        Helpful (2)

        Will these work with Recaro's?

        • These will work with Recaro seats as the Recaros have inserts in the seats to feed the belt through the head and neck position.

        Helpful (2)

        Will this fit a 2018 GT ?

        • This is not compatible with 2018 GT models.

        Helpful (1)

        I can't see any actual difference between the QuickFit Pro and the normal QuickFit except the belt buckle design. Are there any other differences?

        • The difference between this seatbelt harness and the Quickfit is that this one is HANS compatible which is more ideal for the track in case of a crash, the quickfitbelt wouldn't be compatible with the HANS device. 

        Helpful (1)

        You mention a HANS device but if this was being used on the street without one-would it allow enough travel of the passenger for the airbag to prevent an internal decapitation? Do you have crash test demonstrations to show what would happen in the event of a collision with this harness in a street car? Thank you

        Post Your Question
        7 More Questions
        What’s the difference between the pro and standard? What do you get for the extra $100 1 answer
        Can the Schroth QuickFit Pro be used with 2018 Shelby GT350R which does not have a back seat? 1 answer
        Can these harnesses be used with the stock, non-Recaro seats? 1 answer
        Can this seat belt compatible with caged cars? Is this belt tied to the cage in any way? 1 answer
        Since the Boss 302 Laguna Seca has no back seat and seat belts, how does it anchor the shoulder belts? 1 answer
        I would like to know if once installed if I have the ability to pull the lap belt very snugly over my hips? 1 answer
        Can someone explain if this is any safer than a regular over the lap belt? just clips into rear seat belt? 1 answer

          Customer Reviews (20) Write a Review

          Overall Rating 4.6

          out of 5 stars

          • 5/5

            April 25, 2019

            Quick to Install

            First I looked through some youtube videos and then the instructions , they were easy to install and worked great . also very easy to remove and store for the next time


            Year: 2017 Submodel: GT350

            Helpful (0)

          • 5/5

            December 21, 2018

            Great product - instructions confusing

            Hi I bought sets of Quik Fit for myself and my son. It is a great product however the instructions are confusing and not well thought out. I needed to watch a video from one of your vendors to fully understand what needs to be done to install. Also for 2017 model mustangs and after the base of the front seat belt was revised and that is not addressed by Schroth. The video provided a work around


            Year: 2017 Submodel: GT

            Helpful (1)

          • 4/5

            June 05, 2018

            Overall not bad

            The installation went smooth over all by using a combination of the instructions and YouTube. American Muscle should be changing the description but if they don't, I will tell you this, they are NOT and direct fit for 2018 Mustangs. The rear male clip will NOT insert into your stock seatbelt receptacles. Schroth has no fix as this time. My solution was to replace the stock receptacles with 15'-17' receptacles which do work with the harness and your 2018' rear seat belts. This "fix" was approved "verbally" by Schroth. This is a great set up for those of us who don't want to delete our rear seats and install a roll bar but want a little more protection than the OEM seat belts provide. Both Schroth and American Muscle were very helpful with assisting me through out this process.


            Year: 2018 Submodel: GT

            Helpful (7)

          • 3/5

            May 23, 2018

            I expected more...

            ...for the price. 1) Came with cheesy photocopied instructions for a different set of harnesses. 2) You have to bend/hammer a key connection tab to 'make it fit' in the stock rear mounting point. Bending steel weakens the metal. Do you want weakened connection points?


            Year: 2014 Submodel: GT500

            Helpful (5)

          • 5/5

            January 09, 2018

            Schroth Quick Fit Pro Harness

            Great set of seatbelts. Keep you planted in your seat. Love them.


            Year: 2017 Submodel: GT350

            Helpful (4)

          • 4/5

            December 08, 2017

            One Cut and Two Bends Necessary Good Fit for 15-17

            I ordered this for track day and autocross use. Installation is a little more involved than portrayed, but shouldn't take more than a few hours. INSTALLATION: There are no instructions on how to remove the rear trim panel or seat bottom, or where trimming is necessary, but you need to do both. Remove the rear seat bottom first by sliding your fingers under the front edge of the seat, in the middle of both driver and passenger seat cushions. There is a small plastic clip that you push rearward, then pull the whole seat upward and out of the car. Remove the kickplate trim at the bottom of the door by just pulling upwards and inwards, front of vehicle to back. You will need to remove the side trim that is next to the rear passenger seat as well. This is a little more difficult. Pull the trim upwards behind the kickplate, inwards along the middle, and away from the trunk at the back. Then unclip the port that the rear shoulder belt passes through so you can remove the panel from the car completely. You will need to cut the bottom of the panel where it covers the seatbelt pretensioner. Start at the front of the crease where it blends to the rest of the panel, and continue rearward along the crease about 3in. You can then trim downwards back out of the panel and blend it as you see fit. Sandpaper works well to clean up the cut after it is cut with a dremel. This is the only cutting you need to do, and isn't easily noticeable when re-installed. Bend the front seatbelt mounting tab outboard about 30 degrees at a 90 degree crease, close to the top. Bend the rear seatbelt mounting tab about 45 degrees upward, at a 45 degree crease, also near the top of the tab. This is easily done in a vice. Sandwich these under the stock belt mounting tabs, and reinstall the panels and seat and your are done. FIT AND FUNCTION: These are comfortable and easy to adjust. Make sure you read the instructions to pull the lap belt as tight as possible before tightening the shoulder belts. If you are tall and have the seat set as low as possible, have a waist of 30in or below, you may find the tightest position to be barely tight enough. But it does work. The harness does a good job of holding your body stationary.


            Year: 2016 Submodel: GT

            Helpful (5)

          • 5/5

            July 16, 2017

            Great harness!

            What's great about this harness is that you can still use the OEM belt for off-track driving. On the track it provides fantastic support even though my seat is a regular bucket seat. I highly recommend it. One note, I had to notch out some of the plastic around the anchor bolt for the installation. therefore, contrary to instructions, installation does require some modification.


            Year: 2016 Submodel: GT

            Helpful (4)

          • 5/5

            June 27, 2017

            Love the Schroth QuickFit Pro Harness...

            These really hold me in the seat while driving aggressively on the track. No longer have to hold on the the wheel just to stay in the car. Very easy to move out of the way to use the factory 3 point for street use. Be sure to get a head and neck restraint system to use with them. If you have power seats, put them in performance driving position, then slide back an inch or so, cinch down the lap belts as tight as you can, then the shoulders. Push yourself back in the cushion of the seat and rotate side to side to tighten. Now move the seat back forward. Enjoy the ride.


            Year: 2016 Submodel: GT350

            Helpful (4)

          • 5/5

            June 22, 2017


            If you track your car and aren't prepared to put a bar in it, these are perfect. Great quality, design, and function. Also one of the best mods an intermediate driver can make. You WILL go faster.


            Year: 2016 Submodel: GT

            Helpful (5)

          • 5/5

            June 08, 2017


            WELL-LOOK harness, only thing not that perfect is that it is not very easy to install.


            Year: 2015 Submodel: EcoBoost

            Helpful (4)

          • 5/5

            June 05, 2017


            Fit is fantastic. Modification to install is minimally intrusive and definitely fits the bill for the added safety and security I wanted without having to go cage.


            Year: 2017 Submodel: GT350

            Helpful (4)

          • 5/5

            May 27, 2017

            Great harnesses with a awesome fit

            These harnesses were a great fit for the car and we're super easy to install literally 1 hour. You feel more secure and no longer have neck rash from the stock seat belts


            Year: 2012 Submodel: GT

            Helpful (3)

          • 4/5

            April 18, 2017

            good belt system

            easy install looks good in car do road coarse events belt system helps keep u planted in seat also use head restraint with it


            Year: 2009 Submodel: GT

            Helpful (5)

          • 4/5

            January 15, 2017

            Schroth Quick fit with Recaros

            Used these harnesses in another weekend warrior car with great results so went ahead and ordered a set for my '17 GT PP car with Recaros. Nice products, as expected, BUT if you have the Recaros, you will need to REMOVE BOTTOM PORTION OF REAR SEAT AND REAR 1/4 PANEL TRIM! Not mentioned at all in the instruction. FURTHERMORE, YOU WILL NEED TO CUT A SLOT in the trim to accommodate the new receivers.


            Year: 2017 Submodel: GT

            Helpful (5)

          • 5/5

            December 13, 2016

            Does what it's supposed to do.

            Straight forward install and really compresses you into the seat with the ability to add a crotch belt and use a HANS makes it a winner especially for track use. I no longer struggle to stay planted in my seat.


            Year: 2016 Submodel: GT

            Helpful (5)

          • 5/5

            September 12, 2016

            Harness Roadcourse Use Review

            The Schroth QuickFit Pro Harness is very well made and of excellent quality. It is quickly installed/removed for use at a road course. It holds you in your seat with the right adjustment of the lap belt preventing side to side movement. The shoulder harnesses are comfortable and provide even weight distribution across your shoulders. The stock 3-point harness would cause my left shoulder and neck area to be fatigued from strain. After this weekend with 6 sessions the 4-point harness did not fatigue the shoulder area. The Schroth QuickFit Pro Harness is accepted by well known driving organizations. I checked before purchase. I highly recommend for anyone who tracks their Mustang.


            Year: 2016 Submodel: GT

            Helpful (5)

          • 4/5

            September 06, 2016

            Really nice

            Good product and super easy install. Makes you really feel like you are one with the car, the only complaint is that the price is a little expensive.


            Year: 2006 Submodel: V6

            Helpful (5)

          • 5/5

            September 02, 2016

            Schroth Harness

            The installation was quick and easy! Had them in in about 20 minutes. Can't wait to try out on the track!


            Year: 2013 Submodel: Other

            Helpful (5)

          • 5/5

            May 12, 2016

            Harnesses with the greatest versatility

            First off, my harnesses came in very quickly. Shipped the day I ordered them and were on my doorstep two days later. They are built really well. The quality is great and the fitment is too. However, despite a quick install process, the brackets they give that are meant to bolt to the rear stock components under the back seats do not fit right. Which the instructions also mention. Although Schroth could bend these, they don't. As a result, you're forced to finagle and bend the brackets to get them to fit flush so that the seats click back in place. Otherwise everything else was simply loosing and re-tightening some T50 bolts. All in all it took about 30-40 minutes to install and they both look and feel fantastic once in place. Whether it's for the street or strip, it's very easy to unbuckle the harnesses for when you do or don't need them. This design by Schroth allows you to have the versatility to make use of your back seats while still being able to hit the track on the weekends. If you want harnesses without a bar or giving up your back seat, then these are a perfect solution for you.


            Year: 2014 Submodel: GT500

            Helpful (6)

          • 5/5

            March 28, 2016

            Good addition if you track your car

            I installed these in about an hour with my Recaro seats. They hold you in place snugly through turning and braking. Much safer than just a lap belt, you get no chimes or warnings, and your airbags are still in play. Once installed, they pop in or out of the car in minutes. I'm concerned that the harness angle is a bit more than the recommended 12 degrees, but as long as you don't flip, you'll be fine. The only things I'd like to see is that they bend the adapters for you, for the passenger or drivers side.


            Year: 2014 Submodel: GT500

            Helpful (7)

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