Use this exhaust system when you want to enhance your car's performance and sound during daily driving or on the race track. It's perfect for car enthusiasts who want to upgrade their Ford Crown Victoria or Mercury Grand Marquis. The main piping is 2.25 inches in diameter, and it has a cat - back layout that replaces stock exhaust parts from near the catalytic converter. The system ends in a dual split rear exit with 2.25in. satin welded - on single wall turndown cut edge tips.