Steeda S550 Mustang Race Differential Bushing Insert System - Aluminum GT/EcoBoost (2015-2020)

Steeda S550 Mustang Race Differential Bushing Insert System - Aluminum  GT/EcoBoost (2015-2020)
$40.00 (30%)

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Steeda Sales & Service, LLC
555 4440


Steeda Autosports has once again taken the S550 Mustang to the next level of performance with our exclusive Billet Aluminum Differential Mount Bushing Insert System for all 2015-2019 Mustangs GT/EcoBoost! When our engineers sat down to design our street kit, we knew we needed one for the hardcore racers out there, too!

Steeda's race kit kit installs in under 1 hour, is adjustable and can be easily removed - it simply doesn't get any better than this!

It eliminates pinion angle changes, wheel hop, differential deflection all while increasing traction! Made in-house from billet 6061 aluminum.

Steeda's kit adds the strength and support the OEM bushings need to perform the way our hardcore racers intended. Once again, this is not a permanent modification - there is no drilling, cutting or pressing required. Simply loosen and remove a couple bolts and this kit installs in less than 1 hour. Aluminum bushings are included for both the front and rear differential mounting locations. Grade 10.9 hardware is included with zinc-plated washers.

Note: This is a race-only part. It will increase NVH and gear noise. For street and competition use, try our 555 444 3 kit with urethane bushings.

Purchase the Steeda S550 Mustang Solid Aluminum Race Differential Mount Bushing System for your 2015-2019 Mustang GT or EcoBoost from Steeda Autosports today!

Product Benefits
  • Limits IRS differential movement while increasing traction and eliminating wheel hop
  • Designed for the abuse seen racing down the 1/4 mile
  • Easily removable, not a permanent modification
  • 100% designed, manufactured and made in the USA
  • Installs in 1 hour or less

CA Residents: Cancer and Reproductive Harm WARNING

Fitment & Features


Manufacturer: Steeda Autosports
Made in USA: Yes

Installation Information:

Level of Difficulty: Easy
Install Time: About 2 Hours
Tools Required: Basic Shop Tools
Print Instructions:

Vehicle Fitment:

Fits Model Year: 2015, 2016, 2017, 2018, 2019, 2020

Customer Reviews

I am please to say the "thud" is gone
So I was unaware that people had seen an improvement in the "thud" after installing the diff bushing so I hadn't really paid attention to it at all. My car is a GT PP with a ver obvious and annoying thud. Well, after paying more attention to it today I am pleased to say the "thud" is gone. That being said, I did notice a more pronounced shift if that is possible. Maybe a little more notchy, but I like it. Feels like the shifter drops into place easier. Bushings look to be a great investment and mod!
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Reviewed by: Brandon K. from Oklahoma. on 3/7/2016
time to give props to Steeda
My car would not hook up at all. Basically if you gunned it in 1-3 you were burning rubber. The two kits I ordered were "Stop the Hop" and "Differential Bushing Insert System". I opted for the metal bushing. I was worried about too much noise but it seems fine to me. Basically if you have loud exhaust I do know if you can even tell the difference. If anything the car sounds more connected to the transmission if that makes sense. It hooks up at least 70% better now and that's conservative. For those that are wondering about alignment, I had the car aligned at it's zeroed out perfect. Anyway it will still burn tires but it is night and day trying to manage. With this I do not have the feeling the car is going to do a 180 at any given time.
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Reviewed by: Kalvin M. from Pennsylvania. on 8/19/2015
Most noticeable improvement in the car
IRS differential bushings, aluminum: Most noticeable improvement in the car. Probably the best suspension mod I have made. Yes, you shift hard you'll feel a slight clunk as power hits to the rear end and has nowhere to go but to the tires, but that's exactly what I want. Car barely squats at this point and yet is still very comfortable for easy cruising. I have noticed a bit of driveline whine since installing them, but it's so light I don't even notice. Besides, I have a Corsa to listen to and that definitely drowns it out.
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Reviewed by: Nick P. from Texas. on 2/8/2015
WOW. Huge difference on launch!
Just installed the Steeda full aluminum IRS bushings and took Anna for a rip before installing Steeda's IRS subframe braces. WOW. Huge difference on launch! I can honestly say I'm a lot more impressed than I expected to be. Just pulling out onto the street I could feel it was a bit more firm, but when I pulled and hit second, that's when I could really feel them working. There was almost no squat and she just wanted to go. The ass did kick out a bit, but my new wheel/tire combination will fix that. Ride quality really hasn't suffered from this kit either. I expected harshness since it's full aluminum, but it's really not that bad. Yes, you can tell they're there, but not enough to bother me a long drive or anything. Kudos Steeda! Bringing her aback in the shop to install the IRS braces.
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Reviewed by: Chad B. from Georgia. on 11/27/2014
There are no reviews for this product!