Flowmaster American Thunder Cat-back Exhaust SystemThis cat back American Thunder exhaust system is specifically designed for all 1998 2002 Chevrolet Camaro Pontiac Firebirds with the 3. 8L engine and delivers a moderately aggressive exterior sound with a moderate interior tone. The exhaust system is constructed with 2. 50 inch mandrel bent aluminized steel tubing, includes a specially tuned resonator to help keep the interior tone down to a minimum, then flows into the 80 Series cross flow