AIRAID has developed a state-of-the-art Cool Air Intake System for the new 05-09 Mustang, p/n 450-177 that generates an additional 13 rear-wheel horsepower and 10 lbs/ feet of torque. The new V6 Mustang system utilizes a roto-molded, cross-linked polyethylene intake tube and light-weight composite Cold Air Dam. The AIRAID MXP Series represents the ultimate in Cold Air Induction systems. Designed for high-performance gas and diesel applications, the MXP Intakes start with a new one piece roto-molded air box that addresses all the shortcomings of the restrictive factory design. Then AIRAID adds a new air intake tube constructed of cross-linked, high-density Polyethylene that is designed using extensive computer modeling to maintain proper mass air flow readings and calibration. They also frequently have a built-in velocity stack, which further promotes airflow. What this all means is a simple-to-install system that was designed using extremely sophisticated technology to increase airflow while maintaining proper air / fuel ratios, therefore eliminating the need for re-calibration once installation is complete. Just bolt it on and go! Like any other AIRAID Intake System, the MXP includes an AIRAID Premium Filter that is sized to maximize power and efficiency.Click the E.O. number (D-609-5) to find out if your application is listed. If your application is not listed then your intake system is not legal for sale or use in California and some other states.Fits:FORD MUSTANG 2005-2009 V6 4.0L