This intake kit is specifically designed for 2003-2004 Ford Mustang Mach 1 models equipped with the 4.6L DOHC V8 engine. The K&N Engineering Performance Intake Kit for the Ford Mustang Mach 1 V8 4.6L DOHC from 2003 to 2004 is a high-performance air intake system designed to optimize airflow and filtration efficiency.