Flowmaster American Thunder Cat-Back Exhaust System - 3 in Diameter - Single Side Exit - GM Fullsize Truck 1996-99 Proform Parts these items are available through

these items are available through Hughes Performance at 800-274-RACE

Housing and Cover are CNC machined and phosphate coated

power valve channel restrictors & idle feed restrictors)

Specially Designed Resonators

1967-1978 Pontiac Catalina

Flowmaster American Thunder Cat-Back Exhaust System - 3 in Diameter - Single Side Exit - GM Fullsize Truck 1996-99 Proform Parts these items are available throughFor the person who wants a subtle custom appearance with all the benefits that a Flowmaster Cat back exhaust system provides. S. O. S. (Single out side) systems are the perfect choice. American Thunder systems delivers a moderate to aggressive interior and exterior tone and are suited to the enthusiast who wants their performance to be heard. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for