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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.
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 Horsepower | 280 HP | 300 HP |
| Peak Torque | 309 FT-LBS | 322 FT-LBS |
| Peak HP Gains vs. Factory Catalyst | 22 HP @ 5,650 RPM | |
| Peak TQ Gains vs. Factory Catalyst | 22 FT-LBS @ 2,850 RPM |
| Make | Model | Years | Chassis | Engine |
|---|---|---|---|---|
| Audi | A4 | 2017+ | B9/B9.5 | 2.0 TFSI |
| Audi | A5 | 2018+ | B9/B9.5 | 2.0 TFSI |
| Audi | allroad | 2017+ | B9/B9.5 | 2.0 TFSI |
| Audi | Q5 | 2018+ | B9/B9.5 | 2.0 TFSI |
Note: Will not fit later B9.5 cars (2021+) with v-band turbo outlets.
Important: This racing catalyst requires a Stage 2 ECU remap to eliminate any check engine lights due to removal of the factory catalyst.
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The installation of your Cast Stainless Steel Racing Catalyst, B9 Audi A4/A5 & Allroad 2.0 TFSI 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.
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When Will This Ship?
In stock This products will ship within one business day from our warehouse in Québec, Canada.
Direct ship This product will ship direct from our supplier. Processing time and availability is subject to suppliers stock.
Warehouse transfer This product could take up to 12 business days before leaving our warehouse for delivery. Availability is subject to suppliers stock.
Free Shipping
All orders of $499 or more being shipped within Canada qualify for free standard shipping. Additionally, orders less than $499 qualify for an exclusive low shipping rate.
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
In-Stock Products
In Stock
Items marked as "In Stock" are physically in our facility, so they're ready to ship when the order is placed. If all items in your order are "In Stock", then your order typically ships within one business day.
Other Availability Modes
We use several availability modes to most accurately identify when products will leave their home facility:
Direct Ship This product is available and will be sourced from one of our suppliers. It may take up to three business days before it ships.
Warehouse Transfer We receive the item, then we ship it to remain on time with the guaranteed delivery range chosen at checkout. It typically takes between 6 and 12 business days before it ships.
Discontinued - No longer available This product has been discontinued by the manufacturer and is no longer available.
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