AFE 49-42024 MACH Force-Xp Cat-Back Exhaust System (Polished Tips) for 05-10 300 / Challenger / Magnum 5.7L Hemi. This exhaust system is constructed from 3" mandrel bent, stainless steel and is MIG-welded. The system uses dual high-flow mufflers with 3" tubing which improves performance across the power band while maintaining the true muscle car sound. This system is finished off with dual 4" straight cut, double wall, polished 304 stainless steel tips for a subtle yet aggressive look.