Headers 2in Primary w/Catted Leads

The Stainless Works Headers 2in Primary w/Catted Leads (model HM642HDRCAT) are engineered long-tube headers designed specifically for Mopar Gen III Hemi engines, fitting 2005–2021 Chrysler 300, 2006–2021 Dodge Challenger and Charger, and 2005–2008 Magnum platforms. These headers address the factory exhaust manifold's restrictive design, which limits scavenging efficiency and traps heat in the engine bay. By replacing those restrictive castings with tuned, primary tube runners and a 3-inch collector, you unlock measurable gains in horsepower, torque delivery, and engine responsiveness while reducing underhood temperatures.

Built from mandrel-bent stainless steel, these long-tube headers maintain their integrity and corrosion resistance across thermal cycles and aggressive driving conditions. The 2-inch primary diameter matches the flow characteristics of a naturally aspirated Hemi, optimizing scavenging across the RPM band without creating backpressure that chokes midrange power. The integrated catted leads—catalytic converter sections welded directly into the collector outlet—ensure emissions compliance while preserving flow. All necessary mounting hardware is included, simplifying installation; the complete assembly weighs 60 pounds and arrives ready to bolt onto your engine bay.

Performance enthusiasts, weekend warriors, and daily drivers benefit equally from this upgrade—whether you're targeting dyno gains, improved throttle response, or simply reducing engine bay heat soak during summer cruising. Installation requires basic mechanical knowledge and access to a lift or ramps; most experienced technicians complete the job in 4–6 hours. The catted design eliminates the need for a separate cat-back system modification, making these headers a direct, plug-and-play solution for Hemi owners seeking the next logical step in bolt-on performance tuning.