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BMR IRS Cradle Bushing Lockout Kit; Black Hammertone (15-20 Fastback)

Item 391001
Market Price $252.94 You Save 13% ($32.99)
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$219.95 (kit)

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      Review & Installation Video

      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • BMR Suspension IRS Cradle Bushing Lockout Kit
      • Reduces Bushing Deflection, Wheelhop and Cradle Deflection
      • Centers Cradle Under the Car
      • Little to No Increase in NVH (Noise, Vibration, Harshness)
      • 1-5/8" DOM Tubular Steel Construction
      • Durable Black Hammertone Powder Coated Finish
      • Designed and Manufactured in the USA
      • Simple Bolt-On Upgrade
      • Fits 2015 to 2020 Fastback Mustangs


      Reduce Wheel Hop and Deflection. Do love lighting up the rear wheels of your Mustang at a stop light? Sure we all do. However, S550 owners seem to have to deal with more wheel hop issues than previous generations. This is because the 2015 to 2020 Mustangs feature an Independent Rear Suspension (IRS) that is well known for deflecting under rapid acceleration causing loss of traction and unnecessary wheel hop. By installing a BMR Suspension IRS Cradle Bushing Lockout Kit you will virtually eliminate all troublesome cradle deflection and see an increased improvement in rear wheel traction for more impressive tire smoking burnouts.

      80%-90% Reduction In Deflection. The BMR IRS Cradle Bushing Lockout Kit uses lockout rings and locating washers to hold the IRS cradles inner sleeve bushings securely in place preventing the cradle from moving in any direction. During testing of the Lockout Kit, BMR documented an 80% to 90% decrease in fore/aft IRS cradle bushing deflection. A bone stock Mustang with no suspension modifications and factory tires will see a 90% or higher reduction in cradle deflection. Where a modified, more race oriented Mustang equipped with stickier performance tires will experience slightly less of a reduction. A BMR test vehicle launched at over 7000 rpm, on drag radial tires, saw about an 80% decrease in bushing deflection. Throughout the entire testing process BMR saw a 95% or higher decrease in vertical deflection under all testing conditions.

      Centers IRS Cradle. BMR's IRS Cradle Bushing Lockout Kit not only reduces deflection and wheel hop, but it also centers your Mustangs IRS cradle. Replacing the factory sheer plates, the included cradle braces perfectly centers the IRS cradle under the rear of your Pony. The frame side bolts of the brace locks the cradle securely in place, so that it does not move under any form of spirited driving.

      Superior Construction. BMR proudly designs and manufactures their IRS Cradle Bushing Lockout Kit right here in the USA. BMR's Lockout Cradle Braces are made from 1-5/8" diameter, heavy-wall DOM steel tubing for superior strength and extra rigidity. These Lockout Braces are then completed in a durable black hammer-tone powder coated finish for aggressive good looks and long lasting corrosion resistance.

      No Increase in NVH. BMR's IRS Cradle Bushing Lockout Kit was engineered to drastically reduce bushing and cradle deflection with little, to no change in NVH (Noise, Vibration and Harshness). Seeing that there is no noticeable increase in NVH, this BMR IRS Lockout Kit is perfect for street, auto cross and race applications.

      Simple Bolt-On Installation. Installation of the BMR Suspension IRS Cradle Bushing Lockout Kit can be completed in about two hours with just basic hand tools. This BMR IRS Lockout Kit utilizes the existing factory bolt holes, so no cutting, welding or extra modifications are needed. Please note that an alignment, by a qualified shop, is highly recommended after installation.

      Application. This Black Hammertone BMR Suspension IRS Cradle Bushing Lockout Kit is designed as a direct bolt-on upgrade for use on 2015 to 2020 Fastback Mustangs equipped with the factory Independent Rear Suspension (IRS), including the V6, EcoBoost, GT, GT350 and GT500 models. Not intended for use on Convertible models.

      Fitment: 2015 2016 2017 2018 2019 2020 Details

      MPN# CB005H

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (56)

      Write a Review

      Ratings Summary

      4.9 out of 5 overall rating from 56 customers

      Installation Time: Afternoon

      Installation Cost: $100-$250

      • January 05, 2020

        5 2017 GT350 - Magnetic350 Installation Time: Less than 1 Hour

        Bmr cradle gt350

        Nice piece, really helped the wheel hop. Highly recommend

        Helpful (1)
      • October 01, 2019

        5 2019 GT - Bob

        No hop

        Wow. It works. Easy install . No wheel hop . So far American muscle has not let me down this is the fourth product that I purchased from them and have had no issues so far. I will keep Doing business with American muscle.

        Helpful (1)
      • January 04, 2019

        5 2018 GT - Josh Installation Time: Less than 1 Hour


        The BMR cradle bushing lockout made a huge difference in the stability of the rear, it used to break loose under acceleration and was unsettled in the corners, now its alot firmer and responsive, its helped the car to be more predictable through the corners and during a burnout, its also helped with launch and its more controllable in a drift. GREAT PRODUCT. Money well spent

        Helpful (5)
      • December 14, 2018

        5 2015 GT - Wideopenthrottle23 Installation Time: Afternoon

        Definite difference in hard launches.

        NOTE: This mod will NOT fit if you have some steeda subframe braces installed already and would remove steeda subframe bushings if you have those. Performance and ride: Overall Must-Do Mod. The performance difference is definitely noticeable. It makes the rear end feel more connected and stiff, making the car want to keep the wheels against the pavement when they start to slip. I’ve been testing the car in the winter weather too so I can imagine once it’s warm again it’ll be an even bigger improvement. Install: if you’re installing these yourself make sure to take your time and make sure the car is always safely supported. I did this myself with one other person without a lift. I think I used 2 jacks and two stands to be safe.

        Helpful (6)
      • December 04, 2018

        5 2016 GT - Chester Installation Time: Less than 1 Hour

        Easy install

        The install was easy and fast. Definatlly worth the time and money to help save the rear end from axle hop and distruction.

        Helpful (3)
      • November 23, 2018

        5 2016 GT - Aaron Installation Time: Afternoon

        Bmr lock out

        Great product, everything matched up. Can’t wait to test out.

        Helpful (3)
      • November 20, 2018

        5 2017 GT - AlbertM Installation Time: Shop Install Installation Cost: $250-$500

        Wheel hop was completely eliminated.

        I did Steeda subframe alignment kit, Steeda subframe bushing support, Steeda differential bushing insert system, Steeda irs subframe braces, Bmr adjustable rear toe link and Bmr cradle bushing lockout kit. Then wheel hop will be eliminated.

        Helpful (5)
      • October 12, 2018

        5 2018 EcoBoost - TheWildman Installation Time: Afternoon

        Very nice!

        Definitely stops wheel hop issues. Still a little bit of it, but I just need to work on my launch. These fit like a glove. Install isn't too difficult. Just have to lower the exhaust and drop the rear subframe. I had everything installed in about 2.5 hours taking my time.

        Helpful (5)
      • October 02, 2018

        5 2015 GT - DrewB Installation Time: Shop Install Installation Cost: 0-$100

        really like

        This has helped with launches. On video looks like it goes straight more and don't feel the wheel hop like before. I do have other BMR products installed on rear. Very happy with product. Direct fit.

        Helpful (4)
      • June 10, 2018

        5 2018 GT - RR Installation Time: Less than 1 Hour

        Reduced wheel hoop Amanzingly

        Easy installation , no road noise n wheel hoop gone 90 as expected it

        Helpful (6)

      Questions & Answers (12 answers)

      5 Top Rated Questions

      What is the difference between this BMR Cradle kit and the SR performance IRS tie down kit? Are they the same? Is one better? Also can I use the Steeda subframe tie downs as well?

      • The SR Performance IRS Tie Down Kit and the BMR IRS Cradle Bushing Lockout Kit will perform the same function in the same manner. Both kits can be used in conjunction with the Steeda IRS Subframe Braces

      Helpful (3)

      This kit removes the factory IRS brace plate. I have Steeda irs braces now. Will this still work seeing that one Steeda bolt will have nothing to mount to?

      • The BMR IRS Cradle Bushing Lockout Kit would not be compatible with the Steeda IRS Braces.

      Helpful (2)

      This may sound like a dumb question, but will this lock out kit work with the Steeda IRS Subframe Bushing Support System, or is the Steeda system not required as this system includes what the Steeda system basically provides?

      • Using this with the Steeda IRS Subframe Bushing Support System would be redundant and the two cannot be used together.

      Helpful (1)

      Do i need an alignment after this install ?

      • Yes, an alignment is recommended after installing these.

      Helpful (0)

      Will there be any fitment issues with this product if I am running 275/35/20’s in the front and 305/35/20’s in the rear?

      Post Your Question
      7 More Questions
      Need a kit that will fit convertible. Please advise. Tnx 1 answer
      I have a 2018 PP1 GT with MagnaRide. Is this part a beneficial upgrade? 1 answer
      Do I want to upgrade to urethane bushings when I install these or is it not necessary? 1 answer
      I see from the reviews that all the installs are done on the GT model. Can this kit along with other suspension mods benefit the 3.7 V6 owner? 1 answer
      Why won't this kit fit a convertible? Can it be modified to fit? 1 answer
      Will this fit EU/UK/AUS S550 versions? 1 answer
      Will this fit if I have the Steeda rear subframe support braces installed? 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (2) Lockout Brackets
      • (2) Front Upper Spacers
      • (2) Rear Upper Spacers

      Tech Specs

      Will It Fit My Mustang

      • Bullitt - 19, 20
      • EcoBoost - 15, 16, 17, 18, 19, 20
      • GT - 15, 16, 17, 18, 19, 20
      • GT350 - 15, 16, 17, 18, 19, 20
      • GT350R - 15, 16, 17, 18, 19, 20
      • GT500 - 20
      • V6 - 15, 16, 17

      Intended for Fastback models only.