This 2.5" diameter dual Cat-Back™ system contains a Merge X-Pipe for increased performance and improved sound. The system features the aggressive ATAK® sound with no drone inside the vehicle. The exhaust exits thru single 4" round bright chrome on T-304 stainless steel tips on each muffler assembly. A system with black chrome on T-304 stainless steel tips is also available. Optional front muffler 60561 can be added to replace the Merge X-Pipe for addtional sound control. BORLA® Cat-Back™ and Axle-Back multi-core technology is designed to unleash hidden horsepower. Increased exhaust velocity adds power, driving excitement, fuel economy, and the distinctive BORLA® Sound of Power respected by motoring enthusiasts everywhere.