This high - performance charge pipe is perfect for Subaru WRX owners from 2022 onwards who want to boost their car's performance. Whether you're on the daily commute or hitting the track, it'll give you a more responsive drive. It's made of stainless steel and has a 2.5 - inch diameter from the turbocharger outlet to a 2.38 - inch machined inlet flange of the TMIC, providing a significant upgrade over the stock pipe.