Use this MagnaFlow exhaust system when you're looking to enhance your driving experience, whether it's for daily commuting or weekend joyrides. It's perfect for car enthusiasts who want to add some personality and performance to their 2006 - 2007 Chevrolet Monte Carlo SS or Impala SS. The main piping is 2.5 inches in diameter, and it has 3 straight - through mufflers with 4 - inch polished welded - on double wall angle cut rolled edge tips. Installation is a breeze thanks to its direct - fit design.