The Wagner downpipe kit has been developed for the Subaru WRX STI (model years 2007-2018) and is made from cast stainless steel 1.4301 (SS304) for maximum durability and corrosion resistance. The flow-optimized, CAD-engineered design reduces back pressure and thermal load, extending the turbo's lifespan and noticeably increasing torque.
The downpipe is equipped with a 300 CPSI racing catalyst with EU6 coating for optimal emission control without loss of performance. With a diameter of Ø76 mm The downpipe offers maximum flow, resulting in smoother acceleration and faster throttle response. The kit fits the original parts, making installation simple without additional modifications. Thanks to the integrated lambda sensor connection, exhaust gas measurement is optimized. For extra flexibility, an optional after-cat replacement pipe (Ø76 mm) is available.
Properties
- Made of cast stainless steel 1.4301 (SS304) for maximum durability and corrosion resistance
- Ø76 mm diameter and CAD-optimized design for maximum flow and better acceleration
- 300 CSI racing catalytic converter with EU6 coating for excellent emission control without loss of performance
- Direct replacement without complex modifications
- Reduces thermal load on the turbo and increases reliability
- Integrated lambda sensor connection for optimized exhaust gas measurement
- Optional after-cat replacement pipe (Ø76 mm) available
Technical specifications
- Vehicle: Subaru WRX STI (2007-2018)
- Material: cast stainless steel 1.4301 (SS304)
- Diameter: Ø76 mm
- Catalyst: 300 CPSI racing catalyst with EU6 coating
- Production technology: CAD-optimized, flow-optimized
Contents of the set
- Wagner downpipe kit 300 CPSI
- Lambda sensor connection
- Optional after-cat replacement pipe (Ø76 mm)
Frequently Asked Questions
For which car is this downpipe suitable?
For the Subaru WRX STI with model years 2007-2018.
Which catalytic converter does the downpipe have?
A 300 CSI racing catalytic converter with EU6 coating for optimal emission control without loss of performance.
Do I need to modify the exhaust for installation?
No, the kit fits the original parts and is a direct replacement without complex modifications. An optional after-cat replacement pipe (Ø76 mm) is available.
