SLP's Long Tube Headers for the SRT-8 Hemi powered Dodge Charger/Magnum and Chrysler 300C are The headers are must have item. Whenever your adding HP to your project, you can't loose site of the fact that larger engine need to breath big. These mandrel bent stainless steel and ceramic coated headers keep heat in, exhaust velocity up, and under-hood temperatures down. The rest of the header system is made from 3" stainless steel to ensure years of trouble free operation. SLP takes it one step further by including a pair of 3" high-flow bullet catalyst converters, which flows into a full 3" down pipe assembly that is sized down to 2.75" which bolts up to your factory cat-back exhaust system. All necessary hardware and installation instructions are included backed by their Lifetime Warranty.