Exhaust Header

The Gibson Exhaust Header GP311S-C is a performance-oriented exhaust header system engineered for 2003–2008 Dodge Ram full-size trucks equipped with the Gen III Hemi engine. Featuring 1.5-inch primary tubes, a stock collector flange, and silver ceramic coating, this pair delivers improved exhaust scavenging and thermal management over factory manifolds. The included gaskets and hardware ensure a direct bolt-on installation without additional fabrication or component sourcing.

The 1.5-inch primary diameter is optimized for stock and mildly modified Hemi displacements, providing a balanced compromise between low-end torque retention and mid-range flow improvement. The silver ceramic coating serves dual purposes: it reduces under-hood radiant heat, protecting nearby components and lowering engine bay temperatures, while also offering corrosion resistance in harsh conditions. The stock collector flange maintains OEM compatibility, allowing retention of existing exhaust piping and muffler configurations while upgrading only the manifold section.

This header pair suits truck owners seeking improved throttle response and fuel efficiency without the expense of a complete exhaust system overhaul. The steel construction rated at 20.33 pounds provides structural durability for long-term service on both street and light-duty off-road use. By including all necessary gaskets and hardware, Gibson eliminates the frustration of incomplete purchases and reduces installation time for DIY builders and professional shops alike.

The Gen III Hemi platform is known for responsive power delivery, and upgrading from restrictive factory manifolds to a properly sized header improves scavenging efficiency across the RPM range. For Ram owners balancing performance gains with practicality and budget, the Gibson GP311S-C headers bridge the gap between bolt-on simplicity and measurable exhaust system benefits.