MagnaFlow Sys CB 66-72 GM CST-10/CST-20The MagnaFlow Chevrolet Street Series 16643 brings enhanced engine sound and dyno proven performance to your 3. 8L, 4. 1L, 4. 3L, 4. 6L, 4. 8L, 5. 0L, 5. 3L, 5. 7L, 6. 5L, 6. 6L 1960 1972 Chevrolet with a healthy helping of our deep, resonant signature exhaust note at Agressive exterior and Moderate interior sound levels. Thanks to its durable, corrosion resistant stainless steel design, this Chevrolet exhaust system will handle whatever tarmac you