Unitronic UH051-EXA Downpipe Audi 8V RS3 and Mk3 TT RS
The Unitronic UH051-EXA Downpipe replaces the restrictive factory downpipe with a larger free-flowing system. While adequate for the stock power levels, the OEM downpipe suffers from a sharp transition exiting the turbo, then splits into kinked piping, with less than 50mm of diameter on one side and ~58mm on the other. 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, yields output of up to 621HP/564LB-FT with E85 and other supporting hardware modifications.
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
Unitronic UH051-EXA highlights:
GESi 5” G-Sport ultra high output UHO+ 400cpsi catalytic converter: Flow rated at up to 1000 HP by GESi.
Cast stainless steel pre-cat downturn and post-cat transition: Improves flow and decreases back pressure.
Factory catalytic converter position: Ensures catalyst warm up and efficiency.
OEM oxygen sensor placement: No need for O2 sensor extension or modification of the wiring harness.
Dual 70mm T304 stainless steel tubing: Quality material that will not rust and will outlast your vehicle.
Direct bolt-on fitment with OEM mounting locations: Uses factory mounting locations on the engine and front subframe.
OE prop-shaft heat shield bracket: Allows fitment of the OEM heat shield to protect prop-shaft.
TIG welded construction: Professionally hand welded to assure longevity.
Unitronic UH051-EXA Downpipe Vehicle Fitment:
Unitronic UH051-EXA Downpipe Manufacturing: The Unitronic Downpipe is a fully T304 system with a cast stainless steel pre-cat downturn and post-cat transition which then flows into dual 70mm T304 stainless steel tubing with OEM-style corrugated mesh flex bellows.
Unitronic UH033-EXA Downpipe Install: Installation of the APR downpipe typically takes 3-4 hours. Basic hand tools are necessary for installation, no cutting or welding is required. Please observe all safety precautions and follow proper installation guidelines while working on your vehicle.
Unitronic performance hardware products are backed by a limited-lifetime warranty to the original owner against manufacturer or craftsmanship defects. In the unfortunate circumstances that you must take advantage of this warranty coverage, proof of original purchase from an Authorized Unitronic Dealer must be provided. Some products require professional installation and therefore installation must be performed by Achtuning or equally qualified professional VW / Audi specialty workshop to qualify for warranty coverage. Please contact Unitronic at 1.866.341.2447 for more details.
Typically ships within 1 business day from our Redmond WA location
Calculated at Checkout, shipping estimates are available from the cart