NEW DESIGN! TurboXS 2008-2021 WRX/STI downpipe with high flow catalytic converter uses a massive cast 304 Stainless Steel Bellmouth that tapers to 3.0″ piping where it connects to the mid-pipe.
Features Include:
- Two-piece design:
- Reduced shipping costs
- Easier installation
- Cast 304 Stainless Steel Bellmouth upper section for maximum exhaust gas flow
- 3.5 inch diameter 304 Stainless Steel pipe tapering smoothly to 3.0 inch
- Spare wideband oxygen sensor bung included
- Modified pipe path to provide more ground clearance for lowered cars than previous design
- TIG welded and polished to a show quality finish
![Turboxs [08-14 WRX, 08-21 STI] High Flow Catted Downpipe](https://i0.wp.com/www.pd-tuning.com/wp-content/uploads/2026/06/1a164d35a2c0425e65f981ce02464b68.jpg?fit=800%2C800&ssl=1)



