Magnaflow SS Street Series Cat-Back Exhaust | Pontiac Firebird (75-81) (16830)Magnaflow SS Street Series Cat Back Exhaust Part #: 16830 Overview The Magnaflow SS Street Series Cat Back Exhaust for the Pontiac Firebird (75 81) is a high performance exhaust system engineered to enhance your vehicle's sound, style, and overall driving experience. Designed for enthusiasts who seek a combination of aggressive tone and reliable durability, this exhaust system is ideal for both daily drivers and performance oriented builds.