Subaru WRX STI Catalytic Converters
This page brings together catalytic converters for the Subaru WRX STI, covering model years 2015–2021, including direct-fit and manifold-style options alongside universal converters. Choose your model year above and this page keeps only the catalytic converters that fit your Subaru WRX STI. Each listing is matched to our vehicle fitment data before it appears here.
AP Exhaust Federal EPA Catalytic Converter Direct Fit Integrated Manifold
Magnaflow 447236 Universal Catalytic Converter 2.50 Inch Inlet/Outlet
What's here for your Subaru WRX STI
- Direct-fit catalytic converters designed to replace the factory unit
- Manifold catalytic converters that integrate with the exhaust manifold position
- Universal catalytic converters for custom or modified exhaust configurations
The widest selection here comes from Catco, AP Exhaust, Magnaflow, and Walker Exhaust, each offering a range of converter styles and configurations for the WRX STI. Other categories Subaru WRX STI owners shop for: Subaru WRX STI Springs and Suspension Parts, Subaru WRX STI Fluids and Lubricants and Subaru WRX STI Shocks and Struts, or browse all Subaru WRX STI parts and accessories.