This exhaust system is perfect for Subaru Crosstrek owners from 2018 to 2023 who want to enhance their vehicle's performance. Whether you're driving in normal city traffic or facing extreme road conditions, it'll work great. The tubing is 2.5 inches in diameter, made of T304 stainless steel. It's designed for those who love a powerful and long - lasting exhaust that also gives their car a great sound.