The JBA Cat4Ward shorty header for 1999-2004 Ford Mustang 4.6L 4V reduces restriction versus the stock manifold to improve engine efficiency and on-road power delivery. Its Firecone collector is aimed at producing usable power and torque where you drive most. Constructed from 409 stainless with mandrel bends, it includes 3/8-inch thick machined flanges, oversized ports, factory-style emission connections and quality hardware for a professional, no-leak installation.
JBA 99-04 Ford Mustang 4.6L 4V 1-5/8in Primary Raw 409SS Cat4Ward Header