This MagnaFlow exhaust system is perfect for Lexus IS250 and IS350 owners from 2006 to 2013 who want to enhance their car's performance and sound. Whether you're cruising on the highway or showing off at a stoplight, this exhaust will make your Lexus stand out. The main piping is 2.5 inches in diameter, and the tips are 4 inches. It's easy to install, so you can upgrade your ride without much hassle.