Steeda 'Stop the Hop' Drag Ultimate Kit (555-2129-D) - 2015-2023 Mustang
Launch harder and eliminate wheel hop with the Steeda 'Stop the Hop' Drag Ultimate Kit for the 2015-2023 Ford Mustang. Developed specifically for drag racing enthusiasts, this comprehensive IRS suspension package combines Steeda's most effective traction-enhancing components to minimize suspension deflection, improve chassis stability, and maximize power transfer to the rear tires. Whether you're chasing quicker 60-foot times or lowering your quarter-mile ETs, this kit provides the ultimate foundation for consistent launches and improved drag strip performance.
The factory independent rear suspension allows excessive movement through soft rubber bushings, causing wheel hop, inconsistent launches, and lost traction. Steeda's Drag Ultimate Kit addresses every major source of deflection by reinforcing the IRS subframe, aligning the cradle, replacing compliant bushings with precision components, and adding fully adjustable suspension links. The result is improved suspension geometry, greater stability under load, and more efficient power delivery to the pavement.
Kit Includes
- Steeda IRS Subframe Support Braces (555-5754)
- Steeda IRS Subframe Alignment Kit (555-4438)
- Steeda IRS Subframe Bushing Support System (555-4437)
- Steeda Adjustable Rear Camber Arms (555-4123)
- Steeda Billet Aluminum Vertical Links with Delrin Bushings (555-4121)
- Steeda Adjustable Rear Toe Links (555-4120)
- Steeda Rear Lower Control Arm Spherical Bearings (555-4117)
- Ford Performance Knuckle to Toe Link Bearing Assembly (M-5A460-M)
Features
- Purpose-built drag racing IRS suspension package
- Eliminates wheel hop during hard launches
- Strengthens and stabilizes the IRS subframe
- Precision Delrin alignment dowels properly center the subframe
- Billet aluminum IRS subframe bushing supports minimize movement
- Heavy-duty chromoly IRS support braces improve chassis rigidity
- Adjustable rear camber arms provide +2 to -5 degrees of camber adjustment
- Adjustable rear toe links allow precise suspension tuning
- Billet aluminum vertical links with Delrin bushings reduce suspension deflection
- Rear lower control arm spherical bearings eliminate bushing compliance
- Ford Performance toe link bearing assembly further reduces deflection
- Simple bolt-on installation with no permanent modifications
Benefits
- Delivers quicker and more consistent 60-foot times
- Improves traction during hard launches
- Transfers more engine power directly to the rear tires
- Reduces suspension deflection throughout the IRS
- Allows precise suspension alignment for drag racing
- Improves launch consistency and quarter-mile performance
- Provides greater rear suspension control under high load
Fitment Notes
- Fits 2015-2023 Mustang GT, EcoBoost, and V6.
- Designed for coupe models only.
- Does not fit Mustang Convertible models.
- Direct bolt-on installation with no permanent vehicle modifications required.
Fitment
- 2015 Ford Mustang EcoBoost
- 2015 Ford Mustang GT
- 2015 Ford Mustang V6
- 2016 Ford Mustang EcoBoost
- 2016 Ford Mustang GT
- 2016 Ford Mustang V6
- 2017 Ford Mustang EcoBoost
- 2017 Ford Mustang GT
- 2017 Ford Mustang V6
- 2018 Ford Mustang EcoBoost
- 2018 Ford Mustang GT
- 2019 Ford Mustang EcoBoost
- 2019 Ford Mustang GT
- 2020 Ford Mustang EcoBoost
- 2020 Ford Mustang GT
- 2021 Ford Mustang EcoBoost
- 2021 Ford Mustang GT
- 2022 Ford Mustang EcoBoost
- 2022 Ford Mustang GT
- 2023 Ford Mustang EcoBoost
- 2023 Ford Mustang GT
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