JBA 07-14 Ford GT500 5.4/5.8L 4V 1-5/8in Primary Raw 409SS Cat4Ward Header

When you're looking to get more out of your 2007-2014 Ford Mustang GT500, this JBA Cat4Ward Header set is what you'll find in the box. You get the headers themselves, constructed from raw 409 stainless steel, along with factory-style emission connections and all the necessary high-quality hardware for a professional installation. These headers are designed to be a significant upgrade over your stock exhaust manifolds, helping your 5.4L or 5.8L 4V engine breathe much more freely.

The real benefit here comes from how much less restrictive these are compared to the factory setup. JBA uses mandrel-bent stainless steel tubing to ensure smooth airflow, and the 3/8-inch thick machined flanges with oversized exhaust ports help maintain a solid seal. A notable feature is JBA's proprietary Firecone collector design, which is based on race-proven technology aimed at maximizing power and torque gains in the RPM range you'll use most often during daily driving or spirited runs. The extra-thick collector domes add to the overall durability of the assembly.

Because these are designed as a direct replacement for your stock manifolds, they include the factory-style emission connections, which is crucial for maintaining proper emissions system function and avoiding check engine lights. The included hardware is selected for a no-leak installation, meaning you can expect a clean and effective setup once everything is bolted up.