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034Motorsport Cast Stainless Steel Racing Catalyst

offers increased hp/tq throughout the powerband, improved throttle response, and an enhanced exhaust note!
*Important*: This racing catalyst requires a Stage 2 ECU Remap to eliminate any check engine lights due to removal of the factory catalyst.
Mfg Part #
034-105-4043
ECS Part #
ES#3469297
Brand
034Motorsport
595.00
In Stock
Qty
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Product Details

*Important*: This racing catalyst requires a Stage 2 ECU Remap to eliminate any check engine lights due to removal of the factory catalyst.

034Motorsport is proud to introduce the all-new Cast Stainless Steel Racing Catalyst for B9 Audi A4/A5 & Allroad models equipped with the longitudinal 2.0 TFSI engine! Designed as a drop-in replacement for the restrictive factory catalytic converter, the Cast Stainless Steel Racing Catalyst offers increased horsepower and torque throughout the powerband, reduced turbocharger lag, improved throttle response, and an enhanced exhaust note. This upgrade eliminates the primary flow limitation in the factory exhaust system, allowing you to maximize the potential of your turbocharged engine.


Optimized for increased flow and maximum performance, the Cast Stainless Steel Racing Catalyst features organic geometry and a massive 135mm diameter Euro 3 racing catalytic converter in the factory location. This complete drop-in solution includes an integrated 4-bolt flange at the turbine outlet, integrated oxygen sensor bung after the
catalyst, integrated 3-bolt downpipe flange, and a complete gasket/hardware kit to allow for precise fitment and ease of installation. The Cast Stainless Steel Racing Catalyst for B9 Audi A4/A5 & Allroad is constructed from 304 stainless steel and TIG-welded for maximum durability and corrosion resistance.


034Motorsport's Cast Stainless Steel Racing Catalyst was developed entirely in-house on 034Motorsport's development B9 Audi A4 utilizing the latest in 3D Scanning Technology, CAD Software, and Rapid Prototyping techniques. Final production units were then tested extensively on multiple enthusiast-owned B9 Audi A4/A5, and
Allroad vehicles before release.

Cast Racing Catalyst Features:

  • Increased Horsepower & Torque Throughout the Powerband (+ 22 HP / + 22 TQ Peak)
  • Quicker Turbocharger Spool & Faster Transient Response (100-200 RPM Quicker Spool)
  • Enhanced Exhaust Note & Turbocharger Sounds
  • Direct, Bolt-In Upgrade for Factory Catalytic Converter
  • Engineered In-House by 034Motorsport's Engineering Team
  • Factory-Location 135mm Euro 3 Racing Catalytic Converter
  • 304 Stainless Steel Construction with Integrated Inlet/Outlet Flanges & O2 Sensor Bung
  • Precision CNC-Machined Flange Mating Surfaces
  • TIG Welded & Backpurged with Sand-Blasted Titanium-Look Finish

What's Included: 

  • 034Motorsport Cast Stainless Steel Performance Downpipe
  • Integrated Euro 3 Racing Catalytic Converter
  • Factory Turbocharger Outlet Gasket
  • Factory Catalyst to Downpipe Gasket
  • M10 Locknuts (4)
  • M8 Locknuts (3)
  • M8x30 Studs (3)

Supported Vehicles:

  • 2017 - Present Audi A4 (B9) 2.0 TFSI
  • 2017 - Present Audi Allroad (B9) 2.0 TFSI
  • 2018 - Present Audi A5 (B9) 2.0 TFSI

*Emissions Disclaimer*

  • This product is sold for off-road use only.
  • This racing catalyst requires a Stage 2 ECU Remap to eliminate any check engine lights due to removal of the factory catalyst.
  • By purchasing this product, you understand this product is sold for competition use and is not legal for use in highway or street vehicles.

This Part Fits the Following Vehicles

Make Model Submodel Engine
Audi B9 A4 FWD 2.0T
Audi B9 A4 Quattro 2.0T
Audi B9 A5 Quattro 2.0T
Audi B9 A5 Quattro 2.0T Sportback
*The above product applications have been written by ECS Tuning. All warranties, product application, fitment, and performance are the responsibility of ECS Tuning. For additional information see the terms of use.

ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

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