Roush 2015-2017 Ford Mustang Phase 1-to-Phase 2 727HP Supercharger Upgrade Kit - 421994

The ROUSH Phase 1-to-Phase 2 Supercharger Upgrade Kit builds on the outstanding performance of our 2015-2017 Phase 1 supercharger system by adding proven core components and careful calibration, for an additional 57 horsepower and 65 lb-ft of torque. The vehicle delivers an exceptional 727 horsepower alongside 610 pound-feet of torque while maintaining its everyday reliability, which ROUSH Performance engineers have built into its design. The ROUSH engineering team invests multiple hundreds of hours through laboratory work and dyno testing, and fieldwork to achieve steady component performance across all environmental situations.

Product Details

• Condition: New
  
  
• Brand: ROUSH Performance
  
  
• Product Type: Phase 1 to Phase 2 Supercharger Upgrade Kit
  
  
• Fits: 2015–2017 Ford Mustang (Phase 1 system required)
  
  
• Engine: 5.0L V8 Coyote
  
  
• Power Gain: +57 HP / +65 lb-ft torque (total 727HP / 610 lb-ft)
  
  
• Supercharger Type: R2300 TVS Roots-type, twin four-lobe, 160-degree twist
  
  
• Calibration: Factory-tuned Phase 2 calibration included

Features & Benefits

• Builds on the Phase 1 system for noticeable extra power
  
  
• Fully calibrated by ROUSH engineers for smooth daily use
  
  
• R2300 TVS supercharger with 4-lobe rotors improves airflow and efficiency
  
  
• Re-designed air inlet/outlet for smoother delivery and higher RPM control
  
  
• Track-ready performance numbers while maintaining street drivability
  
  
• Straightforward bolt-on installation if Phase 1 is already installed
  
  
• Enhances throttle response, mid-range torque, and engine feel

This Part Fits:

Frequently Asked Questions

Which Mustang does this fit?
2015–2017 Mustang 5.0 models already running a Phase 1 supercharger.

How much power does it really add?
About 57 horsepower and 65 lb-ft of torque, bringing total output to 727 HP and 610 lb-ft.

Is installation difficult?
No. It’s a bolt-on upgrade if you already have Phase 1.

Can I drive the car after installing this?
Yes. It stays smooth and easy to drive, just much quicker.

What makes Phase 2 better than Phase 1?
The R2300 TVS design delivers better airflow, stronger torque, and a smoother, harder-hitting powerband.

Note: The ROUSH Phase 1-to-Phase 2 Kit enables Mustang owners to enhance their vehicles through measurable power improvements, which create an aggressive driving experience while preserving everyday usability.