Pypes Exhaust SGA13S Street Pro 3" Diameter 409 Stainless Steel Crossmember-Back Exhaust System with X-Pipe for GM A-Body Delivers the ultimate in sound & performance, provides extra punch in the passing lane Includes Street Pro Mufflers Ensures maximum exhaust gas flow which significantly boosts horsepower 16 gauge mandrel-bent Stainless Steel resists corrosion & extends the life of the system Includes Pypes life-time warranty