Borla 140356 ATAK Stainless Steel Aggressive Cat-Back Exhaust System Using Borla's patented multi-core technology, this exhaust system for the Camaro SS is one of the most aggressive and fantastic performance modification exhaust pieces available 2.5 inch tip 2.5 inch tip Dimensions: 4.5 inch RD X 5.75 inch This new ATAK exhaust system from borla is one of their finest over all exhaust systems, and the most aggressive and powerful system available for Camaro