Magnaflow systems are made from 100% stainless steel and are dyno tested and proven to make power. All Magnaflow exhaust are mandrel bent and fully welded for a trouble free installation. This system uses a 4x9x11 inch muffler and 5x8x18 inch resonator for a smooth deep tone with dual 4" double rolled edge tips. Includes clamps, hangers, and detailed instructions.