Select Your Vehicle:
Browse & shop Turbo Downpipe Exhausts for your car or truck.
Downpipes are a critical component in turbocharged exhaust systems, connecting the turbocharger to the rest of the exhaust. Upgrading the downpipe improves exhaust flow, reduces backpressure, and supports increased horsepower and torque by allowing the turbo to operate more efficiently.
Performance downpipes are a popular upgrade for Subaru WRX and STI owners looking to improve throttle response, power delivery, and overall performance. For a full breakdown of how downpipes compare to catback and turboback configurations, our guide on downpipe vs catback vs turboback explains what each system does and when each makes sense.
Downpipes for Subaru WRX and STI
Downpipes designed for the Subaru WRX and STI are engineered to handle increased exhaust flow from turbocharged engines. Compared to factory downpipes, performance options reduce restrictions and help unlock additional power when paired with proper tuning.
These downpipes are commonly installed alongside other exhaust upgrades such as catback systems and are often required for higher-performance turbo setups. Proper fitment is critical, as downpipe design varies by model year, engine platform, and turbo configuration.
Choosing the right downpipe depends on your performance goals, vehicle setup, and local emissions requirements. Some drivers prioritize maximum flow and performance, while others prefer solutions that balance power gains with street legality and daily usability.
Catted vs Catless Downpipes
Catted downpipes use a high-flow catalytic converter to help maintain emissions compliance while still improving exhaust flow. Catless downpipes eliminate the catalytic converter entirely, offering maximum performance potential but typically requiring additional considerations for emissions regulations and off-road use.
Most street-driven WRX and STI builds benefit from a high-flow catted downpipe, which provides strong performance gains while maintaining a level of emissions compliance. Our guide on the best catback exhaust for Subaru WRX and STI covers how a downpipe upgrade pairs with a full catback system for the best results.
Downpipe Upgrades as Part of a Complete Exhaust Build
A downpipe upgrade delivers the most benefit when paired with a matching catback or turboback exhaust system. Upgrading only the downpipe while retaining a restrictive factory catback can limit the performance gains the downpipe is capable of delivering.
Downpipe upgrades always require professional tuning to ensure safe air-fuel ratios and ignition timing after the change in exhaust flow. Running an upgraded downpipe without a supporting tune can cause lean conditions and engine damage under boost.
Related Exhaust and Forced Induction Upgrades
- Catback Exhaust Systems paired with downpipes for a complete exhaust upgrade from turbo to tip.
- Turboback Systems full exhaust systems including downpipe for maximum flow and performance.
- Turbochargers downpipe upgrades are commonly paired with turbo upgrades to match exhaust flow capacity.
- EFI Tuning required after downpipe installation to safely calibrate air-fuel ratios and boost targets.
- WRX Exhaust Upgrades Guide plan the complete exhaust upgrade path for your WRX or STI build.
Don't See Parts for your Vehicle?
We'll find it for you within 24 hours! Click the parts locator below: