DNA Motoring CBECC97LS16 Stainless Steel Catback Exhaust System [For 97-04 Chevy Corvette C5 LS1 LS6 5.7L V8 OHV] Made of high quality T-304 stainless steel. TIG welded CNC machine flange for resistance against pressure and corrosion. Aggressive deep and smooth tone sound while ensures smooth exhaust gas flow. Increase engine output and efficiency. Muffler Tip Type: Rounded Quad Tips. Tip Diameter (IN): 3.75".