The aFe MachFORCE XP exhaust system is perfect for off - road enthusiasts and daily drivers of the 2003 - 2009 Lexus GX470. Whether you're hitting the trails or cruising on the highway, this system will enhance your driving experience. It's made from 4 - inch mandrel - bent 409 stainless steel tubing, which is durable and provides maximum flow. The 24 - inch long muffler helps to create a powerful sound and improves performance. Installation is easy as it uses factory mounting locations, so you can get back on the road quickly.