MagnaFlow 3in Street Series SS Crossmember-Back Exhaust | GM A-Body (64-67) (15897)The MagnaFlow Street Series Crossmember Back Performance Exhaust System 15897 brings enhanced engine sound and dyno proven performance to your muscle car with a healthy helping of our deep, resonant signature exhaust note at Aggressive exterior and Moderate interior sound levels. Thanks to its durable, corrosion resistant stainless steel design, this exhaust system will handle whatever tarmac you decide to leave your mark on. This performance exhaust