Roush S650 Mustang Phase 1 Supercharger Kit

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The 740 horsepower, 600 lbs-ft of torque Roush S650 Mustang Phase 1 Supercharger Kit is engineered to provide exceptional performance through innovative design and cutting-edge components, tailored specifically for Mustang enthusiasts seeking peak horsepower and reliability.

*Air Intake system shown sold separately (Part #422334)

We achieved a 10.55 second 1/4 mile at 133 MPH and 0-60 3.00 seconds with a 1.39G acceleration force on a stock car with this supercharger and slicks on a prepped track* (10R80 Automatic Transmission, 3.55 rear gear ratio).

Unmatched Supercharger Design

Dual Front Inlet, Front Drive TVS R2650 Supercharger
This supercharger features a dual front inlet and front-drive setup, maximizing airflow with an optimized, high-flow inlet port. It’s designed for ultimate airflow capacity, ensuring your engine breathes freely to produce unparalleled horsepower.
Iconic Roush Red Head Unit
The supercharger head unit boasts a unique Roush Red finish, adding an unmistakable, high-performance look to your engine bay.
Stock Throttle Body Compatibility
The kit reuses the factory twin 80mm throttle bodies, retaining a symmetrical appearance and allowing you to reuse stock induction components for a clean and streamlined look.
Inverted Supercharger Layout
Featuring an inverted design, the Roush Phase 1 kit houses dual high-efficiency intercoolers. This setup maximizes heat transfer while lowering intake air temperatures, keeping your engine cool under high demand.

Optimized Fuel Delivery and Cooling

High-Flow Dual Cone Fuel Injectors
Equipped with optimized director plates, the injectors target fuel precisely for efficient combustion and enhanced performance.
Custom Billet Fuel Rails
These billet aluminum fuel rails provide maximum flow with minimal restriction, ensuring correct injector alignment and a consistent fuel supply to meet the demands of high-performance driving.
Efficient Supercharger Belt System
Designed with a custom FEAD, 90mm pulley, and strategic hardware placement, the supercharger belt runs closer to the engine, reducing crankshaft load and enhancing overall reliability.
Oversized Front Heat Exchanger
The large front heat exchanger delivers exceptional intercooling with minimal restriction to the factory cooling module. Its custom design makes installation straightforward, with no need to remove the front fascia, saving install time and minimizing any risk of damage.
Specialized Degas Bottle
This kit includes a high-capacity degas bottle that prevents coolant aeration, offering superior cooling capacity for consistent performance.
High-Performance Bosch PCE Intercooler Pump
The intercooler pump is a high-flow Bosch PCE model, delivering reliable cooling to support long-lasting supercharger performance.
Custom-Fit Hoses
Every hose in this kit is custom-formed to ensure a clean installation and streamlined underhood appearance, making the system as easy to install as it is to admire.

Designed for Seamless Installation and Factory Fit

Factory Hood and K-Brace Compatibility
The entire kit is engineered to fit beneath the stock Mustang hood and K-brace without any modification. The K-brace doesn’t need to be removed, making installation simpler and preserving the structural integrity of your Mustang.
Plug-and-Play Wiring
All wiring is plug-and-play, offering a smooth and straightforward installation process.
Ford Performance Spark Plugs
Colder heat range spark plugs with a reduced gap come pre-installed, ensuring optimal performance and durability under increased boost.

Cutting-Edge Tuning and Compliance

Roush Diagnostic Tuning Software
The kit is calibrated with Roush’s Diagnostic Tuning Software, delivering best-in-class performance while maintaining seamless diagnostic capabilities. This software ensures the kit runs smoothly while adhering to Roush’s high standards.
Expert Collaboration with Magnuson Superchargers
Developed in partnership with Magnuson, a company with over 50 years of supercharging experience, this kit brings together Roush's and Magnuson's expertise for a product that excels in performance, durability, and innovation.
SEMA-Certified Emissions Compliant & 50-State CARB Legal
The 2024-2025 Roush Phase 1 Supercharger Kit is SEMA-certified and 50-state CARB EO legal (EO# D-488-66), ensuring it meets emissions standards across the United States for 2024 and 2025 model years.

Phase 1 Supercharger, ran on a 10R80 automatic 2024 Ford Mustang, tested in 6^th gear with 93 Octane fuel. Assumed drivetrain-loss in 6^th gear of 17% for horsepower and 15% for torque with the automatic.

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Specs & Additional Details

Part Number: 422334 (*Intakes sold separately, see Part #422334)
Included Warranty: 3-Year/36,000-Mile Limited Powertrain Warranty(North America Market Only)
This kit is NOT SUPPORTED OR COMPATIBLE with EU6.2 regulations, or vehicles in Brazil & China markets
NOTE: Vehicle Maximum speed is NOT modified from the production configuration, with the installation of this kit.

Ready to take your 2024-2025 Mustang GT to the pinnacle of performance? The Roush Phase 1 Supercharger Kit is engineered to transform your Mustang into a 740 HP powerhouse with unbeatable durability, cooling, and power delivery.

*Power figures are based on optimal conditions using 93-octane fuel. Actual results may vary depending on octane, intake air temps, humidity, manifold charge temps, gearing, wheel/tire combination, and the type of dynamometer used.

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