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SR Performance IRS Tie Down Kit (15-19 Fastback)

Market Price $229.99 You Save 13% ($30.00)
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  • Item 389678

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    Features, Video & Details

    • SR Performance IRS Tie Down Kit
    • Eliminates Excessive Deflection and Wheel Hop
    • Little to No Increase in NVH (Noise, Vibration, Harshness)
    • Square Tubular Steel Construction
    • Durable Black Powder Coated Finish
    • Simple Bolt-On Upgrade
    • Fits 2015 to 2019 Fastback Mustangs

    Review & Installation Video

    Review & Install Video

    Hey, guys, Adam here with Today I'm bringing you a detailed overview and installation of the SR Performance IRS Tie Down Kits, available for all 2015 and newer Fastback Mustangs. So, in this video, I'll be going over the functionality and benefits to your suspension and handling performance you can expect from the IRS Tie Down Kit from SR Performance, as well as all the materials and construction. I'll top the video off with the installation which I'll let you know upfront is actually going to get a very simple one out of three wrenches on our difficulty meter.The SR Performance IRS Tie Down Kit will be for any 2015 or newer Fastback Mustang owner who might be looking to almost completely eliminate the annoying wheel hop that comes along with an IRS built S550. Now, doing so will overall improve your suspension and handling capabilities, especially under the rapid acceleration. So, if you're the lucky owner of a 2015 or newer Fastback Mustang, I'm sure you've noticed your independent rear suspension that comes from the factory on the S550s, is definitely well-equipped to handle tight curves and quick turns with ease. Now, it is also something that comes along with some ugly wheel hop that I'm sure you've also noticed in the process that definitely affects your suspension and handling performance. In my opinion, that definitely needs to be addressed and SR Performance has a product right here, the IRS Tie Down Kit that does just that.Now, the IRS Tie Down Kit includes everything you see here on the table with me today from SR Performance, everything that's used for your suspension to reduce and almost completely eliminate bushing and cradle deflection, the two main ingredients in wheel hop. Now, by doing so, not only are you getting better launches off the rip, but you're also getting better traction at your rear end, great for the street, and also even better for the track. One of the good things about the SR Performance kit we have here in addition to it stabilizing bushing and cradle deflection is the fact that it has little to no increase of NBH or noise, vibration, and harshness, making this perfect for all street performance and race applications.As far as materials and construction goes, this was manufactured out of a mid-welded heavy duty square tubular steel perfect for strength and rigidity, which is great for a suspension handling part. On top of that, it's got a very nice black powder coated finish, something perfect for corrosion resistance and good looks, of course, but after all, it is under the car and it's not really an appearance part. Now, the price tag, in my personal opinion, comes in at a pretty budget-friendly price, and after all, I do think, in my opinion, again, it is very, very worth it. Now, adding the IRS Tie Down Kit, again, almost eliminates the wheel hop which is great for both street and track, so there's really the best of both worlds here, and you can pick this particular kit and everything you see here for just about 200 bucks. Again, it has a very, very worthwhile effect almost eliminating that wheel hop, something that can greatly improve your driving experience even if it's just the daily driver.As far as the installation goes, we'll talk about that for a quick second here. This is something that you can get done in a pretty short amount of time, some guys even claim to have it done in under an hour, but I'd say about an hour or so at the absolute maximum. As far as hand tools are concerned, a ratchet and socket set or a 13 and 21-millimeter wrench, a pry bar, jack and jack stands, or if you have a lift, that's even better. Overall, I would definitely say this is something that gets a one out of three wrenches on our difficulty meter. First thing you obviously wanna do is get the car in the air and support it at the pinch weld with jack stands and support it under the rear cradle as well. Now, from here you wanna loosen up the front and rear cradle bolts and completely remove the front options just to slide the isolator into place.Once the upper isolator is in place, the lower isolator and tie down brackets are next. This is something that is side specific, so keep that in mind going forward. Once those are into place, you can loosely install the factory bolts back into the cradle. Next you can root the rear bolts and then install the shorter and thinner isolators into place as well as the tie down brackets. From there, tighten everything down to spec which will be torqued at 130 foot-pounds for the larger bolts and 40 foot-pounds for the smaller ones. Overall, about an hour's worth of time in your driveway at home and it will get a one out of three wrenches on our difficulty meter.Just to quickly wrap things up here, if you are the owner of a 2015 or newer Fastback Mustang, you might be looking for a way to reduce or almost eliminate wheel hop on your IRS equipped S550. Now, if that sounds like you and you're on a budget, you might wanna check out the SR Performance IRS Tie Down Kit, which is available right here at

    Eliminate Wheel Hop and Deflection. We know you love how the Independent Rear Suspension of your S550 Mustang can handle the tight curves of a long, twisty back road. We also know you are not at all thrilled with the serious wheel hop issues that the factory IRS suffers from under rapid acceleration. Well SR Performance has come up with the solution with their IRS Tie Down Kit. SR Performance designed their IRS Tie Down Kit to reduce excessive bushing and cradle deflection, the main culprit of wheel hop, to greatly improve traction for quicker more consistent launches at the track and on the street.

    Tubular Steel Construction. SR Performance manufactures their IRS Tie Down Kit from MIG welded, heavy duty, square tubular steel for superior strength and rigidity. This kit is then complete in a durable, black powder coated finish for enduring corrosion resistance and aggressive good looks.

    No Increase in NVH. The SR Performance IRS Tie Down Kit is engineered to dramatically minimize cradle bushing deflection with little or no increase in NVH (Noise, Vibration and Harshness). Because there is no discernible change in NVH, this SR Performance IRS Tie Down Kit is ideal for street, performance and race applications.

    Straight Forward Installation. The SR Performance IRS Tie Down Kit can be installed with just basic hand tools in about two hours. This IRS Tie Down Kit utilizes the existing stock mounting points with no welding, cutting or extra modifications required. Please note that an alignment, by a qualified shop, is suggested after installation.

    Application. The SR Performance IRS Tie Down Kit is designed as a direct bolt-on upgrade for use on 2015 to 2019 Fastback Mustangs equipped with the factory Independent Rear Suspension (IRS), including the V6, EcoBoost, GT and Shelby GT350 models. Not intended for use on Convertible models.

    Fitment: 2015 2016 2017 2018 2019 Details

    MPN# 389678

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (2) Tie Down Brackets
    • (2) Front Upper Isolators
    • (2) Front Lower Isolators
    • (2) Rear Upper Isolators
    • (2) Rear Lower Isolators
    Installation Info
    Will it fit my Mustang?
    • Bullitt - 19
    • EcoBoost - 15, 16, 17, 18, 19
    • GT - 15, 16, 17, 18, 19
    • GT350 - 15, 16, 17, 18, 19
    • GT350R - 15, 16, 17, 18, 19
    • V6 - 15, 16, 17

    Intended for Fastback models only.

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    Questions & Answers (5)

    5 Top Rated Questions

    Aside from being $20 less expensive, how does this compare to the BMR cradle lockout kit in quality and performance in reducing wheel hop?

    • This will be a better bang for your buck, however the BMR kit will be the better option between the two.

    Helpful (3)

    Will this fit with the steeda subframe installed? Thanks Jerry

    • This tie down kit would have no problem fitting with the Steeda subframe installed.

    Helpful (1)

    which sub frame alignment kit work with this.

    • At this time we have not tested the SR Performance IRS Tie Down Kit with any IRS alignment kits.

    Helpful (0)

    Will the installation of the tie down kit effect my factory warranty?

    • The SR Performance IRS Tie Down Kit should not have any effect on your warranty, however we always recommend checking with the dealer servicing the warranty to avoid any issues down the road.

    Helpful (0)

    Will you need rear alignment after this installation?

    • For the best handling, it is recommended that you get an alignment after installation of this tie down kit.

    Helpful (0)
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    Customer Reviews (12) Write a Review

    Overall Rating 4.8

    out of 5 stars

    Installation Time:Afternoon

    • Handling Improvement 4.5 4.5
    • Fit 4.666667 4.7
    • Bang For Your Buck 4.75 4.8

    • 5/5

      Installation Time: Less than 1 Hour

      February 04, 2019

      Noticeable Improvement - Less Floaty

      First, the instructions from SR performance are pretty bad - yes this was an easy install, but was a bit confusing from the tiny pamphlet they give you. there are front AND back lockouts for the cradle. After this is installed, you will definitely notice how your car seems to hug the road better - especially on highways when going over bumps and small hills. it's like the car doesn't rock up and down so much.


      Year: 2017 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Less than 1 Hour

      December 19, 2018

      Feels great

      Really puts the rear end down to the ground a lot more!


      Year: 2018 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      November 13, 2018

      pretty easy install

      Good quality piece, easy to install. We installed on jack stands, would have been a breeze on a lift...


      Year: 2016 Submodel: EcoBoost

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      September 21, 2018

      Excellent Choice!

      I decided to give these SR Performance IRS tie downs a try. My wife has a GT with the BMR lock-outs and I can tell you, these are every bit as good. Other than the differance in construction (square tubing -vs- round) I can tell no difference. Install was a breeze. And the price was better for the same results. A really solid performer.


      Year: 2017 Submodel: V6

      Helpful (2)

    • 3/5

      Installation Time: Afternoon

      June 09, 2017

      Good product

      Easy to install. Helped with wheelhoops, but did not eliminate them. Do not expect that it will core 100 of wheelhoop.


      Year: 2016 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Afternoon

      June 02, 2017

      No more wheel hop

      Installed on my 670 HP mustang, no more wheel hop.


      Year: 2017 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      April 28, 2017

      Noticeable difference/fast install

      Noticeable difference in handling and wheel hop. Install is fast and straight forward. Installed while doing Eibach Sportline springs. Easily one of the first mods you should do before any other mods.


      Year: 2016 Submodel: GT

      Helpful (5)

    • 5/5

      Installation Time: Weekend

      April 16, 2017


      Build quality was less than perfect. The paint was chipped in places on delivery and one of the welds was missing paint completely. Not a huge deal since this part is never seen, but worth mentioning. Pro tip: if one of your front subframe bolts won't line up loosen the other three main bolts and it should be easier to get into position. I had to do this and it was still a pain to get everything buttoned up. This install can take 30 minutes or 10 hours. It all depends how your subframe is lined up from the factory. Haven't had a chance to truly test if the wheel hop is gone but I assume from other reviews it did the job


      Year: 2015 Submodel: GT

      Helpful (5)

    • 5/5

      Installation Time: Less than 1 Hour

      January 20, 2017

      SR Performance IRS Tie Down Kit

      Had the steeda sub-frame braces before, but I like these ones better, I like the fact that they hold the frame down at the actual points where it connects to the car, rear feels more solid than before, not that the steeda didn't work, but that these ones do a better job in my opinion


      Year: 2016 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Afternoon

      December 26, 2016

      SR Performance great parts

      I must really praise SR Performances for their quality and price. I've now install their lowering springs and IRS Tiedown kit.....both items fit perfect and made my 2015 mustang ecoboost look and perform as they said it would. Lowering my suspension 1" on all corners made for a much improved stabile ride...corners great,reduced hard braking dives. And the IRS Tiedown kit reduced wheelhop almost completely. Feels great. A must for all 2015 mustang ecoboost.


      Year: 2015 Submodel: EcoBoost

      Helpful (4)

    • 5/5

      Installation Time: Less than 1 Hour

      June 13, 2016

      Easy install, great results.

      The SR Performance Tie-Down kit installed in 20 minuets in my garage, with floorjack, jackstands, and electric tools. The cars wheelhop is almost non-existent now.


      Year: 2016 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Afternoon

      May 04, 2016

      SR IRS Tie Down Kit

      I installed the SR IRS tie down kit this past weekend and I am very impressed with the product. The TIG welds look fantastic and the part feels incredibly strong. The car feels MUCH more planted and there is less wheel hop. Off the line, there is less spinning and more power to the ground. HIGHLY recommend this for your S550!


      Year: 2015 Submodel: GT

      Helpful (4)

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