1968-1972 GM A-Body System Cat-Back 3" (MAG15898)The MagnaFlow Street Series Cat Back Performance Exhaust System is engineered to enhance the sound, performance, and driving experience of your Sys C B 68 72 GM A Body 3inch. Featuring fast flowing, mandrel bent 3in stainless steel piping and 1 straight through performance muffler, this system delivers MagnaFlow's signature deep, resonant tone with dyno proven performance gains. Designed to produce Moderate exterior and Mild interior sound levels, the