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CAST STAINLESS STEEL RACING CATALYST, B9 AUDI A4/A5 & ALLROAD 2.0 TFSI
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CAST STAINLESS STEEL RACING CATALYST, B9 AUDI A4/A5 & ALLROAD 2.0 TFSI


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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!

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  • Shipping info

    We deliver worldwide: UPS, USPS, DHL - or pickup your order in Westlake, Ohio

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  • Return Policy

    We accept returns; please see the Returns and Refunds Page for more info.

  • Weight
    10 lbs
  • SKU
    034-105-4043

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

Fitment

Make Model Year Engine
Audi S5 B9 (2018-Present) 3.0 TFSI
Audi A4 B9 (2017-Present) 2.0T TFSI
  • Manufacturer
    034 Motorsport
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Most parts are available for local pick-up with no shipping or handling charge. Please select the in-store pickup option during checkout. Once we receive your order you will be contacted to schedule your pick-up.

Once your order has been shipped, and if the method of shipping has been assigned a tracking number you will be notified of the number. Please note that carriers such as UPS may not update the tracking number status until late in the evening when the daily pickups have been recorded.

In the event your order arrives and an item is damaged, notify HS Tuning within 5 business days after receiving shipment. Make sure to not discard the box(s), packing materials or broken/damaged product(s). If this occasion arises, we require that you obtain a damage claim number from UPS by calling 1-800-742-5877. During the call you will need to supply them with the information from your shipping label. After obtaining a claim number, contact HS Tuning. If a part is missing from your order, you must contact HS Tuning by either by phone at 216-577-7171 or email at This e-mail address is being protected from spambots. You need JavaScript enabled to view it within 5 business days of receiving your shipment. After 5 business days have passed, HS Tuning will no longer be held responsible.

We accept the following payment methods:


Returns, Refunds, Warranty

Returns will not be accepted after 30 days of purchase, and a 15% restocking fee applies to all orders that are not a result of an error made by HS Tuning. Returns will be refused if the part is not:
- In the original packaging and undamaged.
- Product has not been installed.
- Complete with all parts, manuals and print material.

Please note the following parts are not returnable:
- Electrical components
- ECU Software
- Repairs Manuals
- Tools
- Wheels and Tires
- Hand fabricated and custom parts
- All parts identified as special order

Before any item is returned, HS Tuning requires an RMA (Return Merchandise Authorization) number for all returns. RMA numbers can be issued by phone at 216-577-7171 or email This e-mail address is being protected from spambots. You need JavaScript enabled to view it

HS Tuning
Attn: Returns Department
30205 Clemens Road Unit A
Westlake, OH 44145

Your RMA number must be visible on the outside of the packaging in order for your return to be processed properly.

Product Warranty:

HS Tuning offers only quality products to its customers. If your part fails due to defects in workmanship or materials within the first year of ownership, contact HS Tuning and provide us with a copy of your original invoice as proof of purchase. HS Tuning will not refund money, but will work with you to replace or warranty parts. Either HS Tuning or the product manufacturer will test or inspect the product before a warranty claim adjustment is finalized. Any product that fails due to misuse, neglect, unintended application or improper installation will not be covered under any warranty. HS Tuning is not liable for consequential and incidental damages and/or costs incurred of any kind, including those caused by products sold by HS Tuning.

In addition to the parts listed above that are non-returnable, HS Tuning cannot offer any full warranty coverage on wearable mechanical items and electrical components.