Invidia 08+ Subaru WRX/ 05-09 STI / 02 Legacy High Flow Cat Extra 02 Bung

This Invidia High Flow Cat Downpipe is built with 3-inch diameter stainless steel tubing, a substantial upgrade from stock that helps exhaust gases exit your 2008-2014 Subaru Impreza WRX or 2005-2006 Legacy more freely. The key feature here is the high-flow catalytic converter, which is designed to reduce exhaust restriction while still cleaning up emissions. This is a smart choice if you're looking to improve your car's performance without going fully catless, which is often not street legal or desirable for emissions reasons. Plus, the extra O2 bung gives you a convenient spot to install a wideband air/fuel ratio gauge sensor, which is really helpful for monitoring your engine's performance, especially if you've made other modifications.

The stainless steel construction means this downpipe is well-built to resist corrosion and handle the heat cycles your exhaust system goes through. It's designed to fit directly onto your Subaru, replacing the restrictive factory downpipe. While it's a significant improvement over stock, remember that this part is not CARB approved and cannot be shipped to California. For those outside of California looking to get a bit more out of their exhaust system with a more efficient catalytic converter and the flexibility for tuning, this Invidia downpipe is a solid option.