Cast Stainless Steel Racing Catalyst, B9 Audi A4/A5 & Allroad 2.0 TFSI
We Also Recommend
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)
034Motorsport B9 Audi 2.0 TFSI Race Catalyst Performance Comparisons
These Performance Comparisons were performed using an in-house 2017 Audi A4 2.0 TFSI with development Performance Software and 91 Octane fuel.
Factory Catalyst (91 Octane)
034 Race Catalyst (91 Octane)
Peak HP Gains vs. Factory Catalyst
22 HP @ 5,650 RPM
Peak TQ Gains vs. Factory Catalyst
22 FT-LBS @ 2,850 RPM
Factory Catalyst vs. 034 Race Catalyst - 91 Octane
034 Race Catalyst Power Gains - 91 Octane
2017 - Present Audi A4 (B9)
2017 - Present Audi Allroad (B9)
2018 - Present Audi A5 (B9)
Important: This racing catalyst requires a Stage 2 ECU remap to eliminate any check engine lights due to removal of the factory catalyst.
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.
Select Dyno Chart:
Test Conditions: These Performance Comparisons were performed using an in-house 2017 Audi A4 2.0 TFSI with development Performance Software and 91 Octane fuel.
The installation of your Cast Stainless Steel Racing Catalyst is a relatively complex process that will take approximately one hour to complete. You can access our detailed installation guide by clicking the icon on the left.