Steeda S550 Mustang MagneRide Dual Rate Ultimate Handling Lowering Springs (2015-2021)

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$50.04 (14%)
2015+ Mustang MagneRide Dual Rate Ultimate Handling Lowering Springs. Lowers the Non PP Mustang .750" front & rear or Lowers GT350, PP1, & PP2 Mustangs .500" front & rear. Designed for competition racing but maintains outstanding street-able ride Get the proven performance of Steeda manufactured suspension parts, tested on and off the track for over 30 years.
Part Number: 555 8243
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Are you looking for competition-proven handling performance for your 2015+ S550 Ford Mustang  or Shelby GT350 while still maintaining street drivability? Our Steeda Dual Rate Ultimate Handling Springs are now available for your MagneRide equipped S550 Mustang! Our experience and expertise in high-performance street and racing suspension systems is second to none, and the team here at Steeda has put that experience to work for you. Designed for ALL street and road racing applications, Steeda's Competition springs have the highest rates on the market but still maintain a comfortable and enjoyable ride when put on the street.

Competition-proven in both NASA and SCCA events, these springs greatly reduce nosedive and keep body roll to a minimum for the ultimate in performance handling. By lowering your S550 Mustang .750" all around, these springs provide an optimized center of gravity and an aggressive stance. At a recent HDPE event, Steeda clocked a 4 second lap time improvement with the just our springs and adjustable camber plates. They are a tremendoues handling upgrade for for GT350's as well as any MagneRide equipped S550 Mustang. 

Professional racecar driver, Billy Johnson borrowed a Q500 for some laps at Palm Beach International Raceway and this is what he has to say about them.
"The Steeda Q500 was a blast to drive on track... The adjustable suspension was far from harsh and had a wide range of adjustability to dial the car in at the track. Overall it was a nice dual purpose street and track package that raised the limits of the Mustang GT." - Billy Johnson

See these springs in action in our Steeda Q500

Notice how composed our Q500 is throughout this turn at Palm beach International Raceway


  • Lowers the Non PP Mustang .750" front & rear
  • Lowers GT350, PP1, & PP2 Mustangs .500" front & rear
  • Designed for competition racing but maintains outstanding street-able ride
  • Highest spring rate for dramatic improvement in handling and reduction of nosedive
  • Steeda collaborates with the best motorsport spring engineers in the industry to provide you the best products possible
  • Steeda springs are developed using advanced proprietary CAD data, and our exclusive 3D modeling setting us apart from the others
  • Race-proven in NASA and SCCA events
  • LIFETIME warranty

CA Residents: Cancer and Reproductive Harm WARNING

Fitment & Features


Manufacturer: Steeda Autosports

Installation Information:

Level of Difficulty: Tech Recommended
Install Time: About 4 Hours
Tools Required: Basic Shop Tools, Spring compressor
Print Instructions:
Note: An alignment is highly recommended after installing MagneRide springs

Vehicle Fitment:

Fits Model Year: 2015, 2016, 2017, 2018, 2019, 2020, 2021

Customer Reviews

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Absolutely love them!! Huge difference!! Warning to Bullitt owners, spacers of at least 20mm are required!! This should definitely mentioned on the purchase page
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from Ottawa on 7/11/2020
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