This MagnaFlow exhaust system is designed for off - road enthusiasts who own a 2012 - 2018 Jeep Wrangler JK with a 3.6L V6 engine. Whether you're climbing boulders or navigating rough trails, this exhaust system will enhance your Jeep's performance. The main piping has a 2.5 - inch diameter, and it's made of durable stainless steel. It's also easy to install, so you can get back on the road (or off - road) quickly.