Shorty Headers for Ford Mustang (1996-2004) 3.8L V6 EngineDitch the restrictive factory log manifolds and give your New Edge V6 the deep, throaty rumble it deserves. Performance Stainless Shorty Headers for Ford Mustang (New Edge Essex V6) The 1999 2004 "New Edge" Mustangs came with the reliable Essex V6, but the factory exhaust manifolds hold it back. Ford equipped these cars with heavy, restrictive cast iron manifolds that strangle the "Split Port" engine's ability to breathe at high RPMs. Worse yet, the