The JBA Cat4Ward shorty header for 2011-2017 Ford Mustang 3.7L V6 reduces exhaust restriction to improve power and efficiency compared with the factory manifold. It uses JBA’s Firecone collector to help recover power and torque where you drive most. Mandrel-bent stainless construction features 3/8-inch thick machined flanges, oversized ports, extra-thick collector domes and factory-style emission connections with quality hardware for a professional, no-leak installation.
JBA 11-17 Ford Mustang 3.7L V6 1-5/8in Primary Ti Ctd Cat4Ward Header