CorteX Racing Stage 3 Suspension System
S550 & S650 Mustang (2015–2026)
The CorteX Racing Stage 3 Suspension System represents the highest level of performance available in the CorteX Stage Series lineup. Building upon the geometry and chassis improvements of the earlier stages, Stage 3 replaces the street-focused coil-over system with a professional motorsport-grade damper package, delivering exceptional control, adjustability, and track capability.
Rather than addressing just one element of the suspension, Stage 3 targets the complete system: suspension geometry, chassis compliance, and high-performance damping control. The result is a Mustang that responds with greater precision, maintains composure under extreme loads, and provides the tuning range serious drivers demand.
At the heart of the Stage 3 system is the CorteX Xtreme-Grip™ Penske Double Adjustable Coil-Over System, a race-proven suspension solution developed in collaboration with Penske Racing Shocks. These dampers bring professional motorsport technology to the Mustang platform, offering independent compression and rebound adjustment for precise chassis tuning.
Combined with CorteX’s proven suspension geometry components, the Stage 3 package dramatically reduces deflection, maintains optimal wheel alignment under load, and maximizes mechanical grip.
The result is a Mustang that feels exceptionally connected, highly adjustable, and capable of delivering consistent performance at the limit.
This system reflects the same engineering philosophy CorteX Racing applies in professional motorsport programs. CorteX suspension solutions support Mustang GT4 race teams, and CorteX mono-ball technology is used on the Ford Mustang Dark Horse R race car. At the same time, our components have earned the trust of grassroots racers and club-level competitors who demand real performance from their cars.
Stage 3 brings that same race-proven approach to drivers who want maximum suspension capability from their Mustang chassis.
Stage 3 System Components
The Stage 3 package integrates advanced suspension components designed to work together to maximize grip, stability, and driver feedback.
CorteX Xtreme-Grip™ Penske Double Adjustable Coil-Over System
At the core of the Stage 3 package is the CorteX Xtreme-Grip™ Penske Double Adjustable Coil-Over System, providing a motorsport-grade damper platform with exceptional control and tuning capability.
• Independent compression and rebound adjustment allows precise tuning of chassis behavior for different driving conditions
• Penske race-derived damper technology delivers superior damping consistency and heat management
• Wide adjustment range supports everything from aggressive street driving to competitive track use
• Adjustable ride height allows precise control of vehicle stance and suspension geometry
• Motorsport-grade construction ensures durability under repeated high-load track conditions
This system provides the level of damping precision and consistency typically found in professional racing environments.
Eibach Adjustable Sway Bars
Eibach sway bars help control body roll and allow drivers to fine-tune the handling balance of the chassis.
• Adjustable stiffness allows drivers to tune front-to-rear balance
• Reduces body roll during aggressive cornering
• Improves overall chassis stability and driver confidence
CorteX End-Link Kit
The CorteX End-Link Kit ensures the sway bars operate with maximum efficiency and precision.
• Eliminates deflection found in factory end links
• Provides stronger and more consistent sway bar engagement
• Improves suspension feedback and responsiveness
CorteX Toe Links
Toe links play a critical role in maintaining rear wheel alignment under heavy load.
• Prevent unwanted rear toe changes during acceleration and cornering
• Improve rear-end stability and predictability
• Increase durability compared to factory components
CorteX Vertical Links
Vertical links improve the geometry and stiffness of the Mustang’s rear suspension system.
• Reduce deflection found in factory rubber bushings
• Improve suspension response and chassis control
• Help maintain proper alignment under performance driving conditions
CorteX Mono-Ball Kit
The CorteX Mono-Ball Kit replaces factory rubber bushings with precision spherical bearings.
• Dramatically reduces suspension deflection
• Improves steering feedback and chassis precision
• Provides motorsport-level suspension articulation and accuracy
Who This System Is For
The CorteX Racing Stage 3 Suspension System is designed for Mustang drivers who want the highest level of suspension performance available in the Stage Series lineup.
This system is ideal for:
• Dedicated track-day drivers who demand precise chassis control and repeatable performance
• Competitive club racers looking for professional-level damping adjustability
• Enthusiasts building a high-performance Mustang with serious circuit capability
• Drivers who want the ability to fully tune suspension behavior for different tracks, tires, and driving styles
Stage 3 represents the ultimate evolution of the CorteX Stage Series, combining race-proven Penske damping technology with the suspension geometry solutions that have made CorteX a trusted name among Mustang racers.
The result is a Mustang that delivers exceptional grip, precision feedback, and the adjustability needed to push the chassis to its limits.