Roush 421240 Cold Air Intake System Kit for 2011-2014 Ford Mustang 3.7L V6

Vehicle Fitment

• 2011-2014 Ford Mustang (3.7L V6, Coupe & Convertible, RWD)

Fitment Notes

• Designed exclusively for vehicles equipped with the 3.7L V6 engine.
• No tuning or PCM calibration required for installation on a stock Mustang.
• Maintains emissions legality with proper installation; includes EO certification labeling.

Features

• High-flow cold-air design increases incoming airflow while reducing pressure drop.
• Washable and reusable synthetic air filter provides long service life.
• Injection-molded intake tube engineered for precise fitment and reduced heat soak.
• Durable airbox with oversized opening draws cooler ambient air from the grille area.
• Improves throttle response and induction sound without requiring additional tuning.
• Retains all factory sensors and mounting points for a seamless installation.
• Constructed using OEM-level CAD data for factory-quality fit and finish.
• Backed by ROUSH limited warranty for long-term reliability.

Specifications

• Part Number: 421240
• Application: 3.7L V6 Mustang (2011-2014)
• Filter Type: Washable synthetic high-flow element
• Tube Material: Injection-molded composite
• Intake Style: Open-element cold-air system
• Installation Time: Approximately 1 hour

Included Components

• 1x ROUSH cold-air intake tube
• 1x Airbox and tray assembly
• 1x Washable synthetic air filter
• Mounting hardware and fasteners
• Installation instructions

Product Description

The ROUSH 421240 Cold Air Intake Kit is designed to enhance overall airflow and improve throttle response on the 2011-2014 Mustang 3.7L V6. By replacing the restrictive factory system with a larger, smoothly contoured induction tube and a high-flow synthetic air filter, this intake improves breathing efficiency without requiring a custom tune or additional modifications.

The molded airbox is engineered to reduce heat soak while directing cooler outside air into the intake system. Installation is straightforward, uses factory mounting points, and preserves full emissions legality. The result is a clean, OEM-quality upgrade that enhances driving feel and increases induction sound while maintaining day-to-day reliability.