Unitronic Downpipe for 2.5TFSI EVO
Product Information
The Unitronic High-Flow Performance Downpipe for 2.5TFSI EVO (DAZA) engines is a direct bolt-on upgrade, designed specifically to eliminate unwanted restrictions in the factory unit and increase power with the help of Unitronic Stage 2 Software. It also helps reduce turbo lag and enhance the exhaust note, while utilizing a GESi 5” G-Sport Ultra High Output UHO+ 400cpsi Catalytic Converter which is engineered to meet or exceed emissions standards. When combined with Unitronic Stage 2 Performance Software, total output is raised to 621HP/564LB-FT with E85 and other supporting hardware modifications.
Features / Benefits
- Cast Stainless Steel pre-cat downturn and post-cat transition
- Dual 70mm T304 Stainless Steel tubing
- TIG-welded construction
- GESi 5” G-Sport Ultra High Output UHO+ 400cpsi Catalytic Converter
- Factory catalyst placement for maximum efficiency
- OEM-style corrugated mesh flex bellows
- Proper factory Oxygen Sensor placement maintained
- OE exhaust hanger mounting provisions
- OE Prop-shaft heat shield bracket
- Direct bolt-on fitment
- Compatible with factory cat-back exhaust system
Hardware Included
- Unitronic High-Flow direct fit Downpipe for vehicles equipped with 2.5 TFSI EVO engines
- All required hardware
Recommended Software
- Stage 2
Unbeatable Design and Construction
![img_093652021uni25tfsievodownpipeweb.jpg](https://www.getunitronic.com/hardware/images/UH051-EXA/unbeatabledesignandconstruction/img_093652021uni25tfsievodownpipeweb.jpg)
As with the original unit, Unitronic utilized the 1-to-2 split downpipe design. Following Audi’s modeling, Unitronic developed a large high-flow cast stainless steel downturn, increasing cross-sectional area, effectively improving flow and decreasing back pressure. Part of the design criteria was to maintain un-biased flow between the runners. Flow through the large catalytic converter aids with flow distribution; and as a result, pressure and exhaust velocity are balanced to maintain efficiency and the distinct sound of the turbocharged 5-cylinder engine. The post-cat cast stainless steel transition continues, allowing for a smooth transition and flow distribution into dual 70mm T304 stainless steel tubing with OEM-style corrugated mesh flex bellows.
Meets or Exceeds Emissions Standards
![img_16602uni25tfsievodownpipeweb.jpg](https://www.getunitronic.com/hardware/images/UH051-EXA/meetsorexceedsemissionsstandards/img_16602uni25tfsievodownpipeweb.jpg)
Unitronic Engineers thoroughly validated designs to ensure the Downpipe yields the results intended with several functional prototypes created. While working together with GESi, Unitronic tested several iterations of their G-Sport Emissions Systems Catalytic Converters to ensure the product meets or exceeds emissions standards and finally chose the GESi 5” G-Sport Ultra High Output UHO+ 400cpsi Catalytic Converter which is rated at up to 1000HP by GESi.
Required Hardware
- 2.5TFSI EVO Spark Plug Set (NGK R7437-9) by Unitronic
- Unitronic 3 inch Intake System for 2.5TFSI EVO
- Unitronic 3'' Turbo Inlet Elbow for 2.5 TFSI EVO
- Unitronic 4 inch Intake System for RS3 and TTRS, 2.5TFSI EVO
- Unitronic 4 inch Turbo Inlet Elbow for 2.5TFSI EVO
Related Hardware
- LHD P3 V3 OBD2 Gauge for 8S TT/TTS/TTRS by Unitronic
- P3 V3 OBD2 Gauge for 8V A3/S3/RS3 by Unitronic
- Unitronic Midpipes for 8Y RS3, 8V.2 RS3 and 8S TTRS
- Unitronic MPI Injector Upgrade Kit for 2.5TFSI EVO
- Please note that specific files are available for vehicles equipped with upgraded injectors
Install
The Unitronic 2.5TFSI Downpipe is a direct OEM replacement. Using 3D modeling technology, Unitronic's Downpipe is a direct bolt-on upgrade that can be installed within a matter of hours with moderate mechanical knowledge and tools.
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