Steeda Shelby GT350/R Mustang Bumpsteer Kit (2015-2020)

1 Review(s)
$80.04 (29%)
FREE SHIPPING! Steedas 2015+ GT350 Mustang bumpsteer kit will allow you to get rid of bumpsteer with no drilling or modification to your Shelby's spindle.
Part Number: 555 8134
If Anderson Composites product is delivered defective or damaged, you must notify Steeda within 24 hours of delivery.

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Upgrade your lowered Shelby's driving performance. The factory GT350 & GT350R are quite capable well mannered machines right off the showroom floor. However, the addition of lowering springs can induce unwanted steering behavior on imperfect surfaces or driving conditions. To regain and improve upon the factory performance, a Steeda bumpsteer kit will correct your steering geometry to stock or better performance.

What is bumpsteer? In short, bumpsteer is an unintended change in steering direction caused by variations in front suspension ride height. In simple terms your car goes left or right upon impacting potholes, body roll or pumping the brakes hard. This can also be transferred to the steering wheel, jerking it out of the driver's grip in extreme cases. 

Adjustable. Steeda's kit includes hardened spacers in differing increment thicknesses allowing you to dial in and achieve the perfect geometry for your lowering spring package.

Battle tested. Steeda puts parts through their paces with real track and racing use. Steeda parts hold up to the brutal conditions and stresses that are put on them and meet our high standards. The GT350 bumpsteer kit is machined from billet aluminum and features a chromoly steel stud. The stud is heat treated and plated after machining. The billet aluminum body is anodized to provide a great looking durable finish. 

Product Benefits
  • Wide range of adjustment
  • Made in USA
  • Direct replacement installation
  • Billet Aluminum and 4140 CM Steel construction

CA Residents: Cancer and Reproductive Harm WARNING

Hi everybody Brian from Here today to show you our BumpSteer Kit for the Ford Mustang Shelby GT350. So, we get asked this question pretty frequently. What is bump steer and bump steer in its simplest form is, as you're going down the road and you hit a bump or an undulation in the road and the front suspension travels in particular one side or the other, the spindle starts to turn a little bit despite you not giving any steering input. That is bump steer. The car tries to pull one way or pull the other way dependent on the bump and the suspension. Now this happens really for a couple of reasons but the easiest way to explain this is you have your lower control arm that travels on one arc and your outer tie rod to the steering rack which travels on a different arc. From the factory the engineers try to design this to be pretty close to equal with the car at its normal ride height but these engineers are pushing the car the way you and I are. Let's dig into this a little bit deeper, as noted a moment ago the engineers found a sweet spot when they were designing the car originally. This is the relationship again between your outer tie rod and steering rack as well as the lower control arm and the arc at which they travel on. Now even if your car stock we know that you're out there putting it through its paces whether it be at an autocross event or a track day and bump steer comes into play even when the car is completely stock because you're compressing one corner of the suspension and as that suspension compresses the tire is going to want to tow out and this is going to cause you to need to put more steering input into the cars fighting you. So you can use these bump steer kits to ultimately adjust it for the use that you're using whether the car stock or modified. Now speaking of modified we know a lot of you have lower to your cars or go on to a stiffer spring rate and realistically any change you make to the factory suspension is going to change the geometry or the relationship in particular between the steering rod end and the control arm and change the access points. You need to bring these back so that ultimately the wheel and the outer tie rod are traveling on the same arc and this is what's going to prevent bump steer. We build our bump steer kits with a heat treated, hardened 4140 Chromoly Steel Studs. The studs are also tapered so that no modifications are required to the car during installation. We also utilize billet aluminum collars that are anodized for corrosion protection. To go another step we use heavy duty Teflon lined rod ends. To ensure smooth operation and durability. We proudly manufacture these in the USA at our Georgia manufacturing facility, because Speed Matters. If you have any questions or comments please post them below. If you enjoyed the content of this video be sure to hit like and share with other enthusiasts. Even better click this little thing down here so you get email notifications of upcoming videos. If you'd like to learn more about this bump steer kit and many of the other great products we offer, be sure to visit us at Don't forget to follow us on social media and most importantly have a great day.
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Fitment & Features


Manufacturer: Steeda Autosports

Installation Information:

Level of Difficulty: Tech Recommended
Install Time: About 2 Hours
Tools Required: Basic Shop Tools, Hammer, 3/8" Ratchet, 15mm Socket, 19mm Socket, 24mm Socket, 5/16" Wrench
Print Instructions: Installation Instructions

Vehicle Fitment:

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

Customer Reviews

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This is a most for all GT 350 owners. All owner of the GT 350 know how hard it's to drive on the freeway with your car moving all over the road following all the tire tracks, this product stops most of all that. It's a dream to drive on the highway.
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from MEDFORD on 6/14/2020
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