034 Motorsport Cast Stainless Steel Racing Catalyst, B9 Audi A4-A5 & Allroad 2.0 TFSI
- Description
- Fitment
- Refund Policy
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 (200 CPI)
- 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)
- Installation Guide

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 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 |
FACTORY CATALYST VS. 034 RACE CATALYST - 91 OCTANE

034 RACE CATALYST POWER GAINS - 91 OCTANE

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
- Important: This racing catalyst requires a Stage 2 ECU remap to eliminate any check engine lights due to removal of the factory catalyst.
EMISSIONS DISCLAIMER
- This product is sold for racing use as well as use on vehicles not registered for on highway use.
- By purchasing this product, you understand that this product is sold for racing use as well as used on vehicles not registered for on highway use, and that it is not legal for use on highway or street vehicles.
- This catalyst requires a Stage 2 Racing Use Only Remap to eliminate any check engine lights due to removal of the factory catalyst.
Returns
Our policy lasts 14 days. If 14 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange. All items are subject to 15% restocking fee from the manufacturer.
To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.
Additional non-returnable items:
Gift cards
Downloadable software products
To complete your return, we require a receipt or proof of purchase.
Please do not send your purchase back to the manufacturer.
There are certain situations where only partial refunds are granted (if applicable)
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of shipping to you will be deducted from your refund. If your original order qualified for free shipping, the actual cost of shipping the item to you will still be deducted from your refund.
If you would like to start a return please click here
Refunds (if applicable)
Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.
If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days.
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of shipping to you will be deducted from your refund. If your original order qualified for free shipping, the actual cost of shipping the item to you will still be deducted from your refund.
Late or missing refunds (if applicable)
If you haven’t received a refund yet, first check your bank account again. Then contact your credit card company, it may take some time before your refund is officially posted. Next contact your bank. There is often some processing time before a refund is posted. If you’ve done all of this and you still have not received your refund yet, please contact us at info@amtuning.ca.
Sale items (if applicable)
Only regular priced items may be refunded, unfortunately sale items cannot be refunded.
Exchanges (if applicable)
To start an exchange, click here
Non-refundable items
The following items are non-refundable and non-returnable once purchased: oils, fuel or oil additives, filters, tuning cables, OBDeleven products, Braum seats, spark plugs, coil packs, and similar consumable, wheel spacers, wheels bolts, license plate brackets, electronic tuning components and any other product subject to discretion of AM Tuning Canada.
Other products from brands such as MHD, Bootmod3, Ecutek, Braum racing, Novitec are also non-refundable and non-returnable.
All sales of these items are final and are subject to the policies and discretion of AM Tuning. By completing a purchase, the customer acknowledges and agrees to these terms.
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