SKU: 63865130275

034Motorsport Stainless Steel Racing Catalyst | B9 Audi S4/S5

Sale price$1101.60 Regular price$1224.00
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Ships within 48 hours · Estimated delivery Oct 10 - Oct 15

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Description

034Motorsport Stainless Steel Racing Catalyst | B9 Audi S4/S5The 034Motorsport Stainless Steel Racing Catalyst for B9 Audi S4 S5 is designed as a drop in replacement for the restrictive factory catalytic converter. The 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

The 034Motorsport Stainless Steel Racing Catalyst for B9 Audi S4/S5 is designed as a drop-in replacement for the restrictive factory catalytic converter. The 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 Stainless Steel Racing Catalyst features a massive 148mm diameter Euro 4 racing catalytic converter in the factory location. This complete drop-in solution includes an integrated v-band flange at the turbine outlet, integrated oxygen sensor bung after the catalyst, integrated 3-bolt downpipe flanges, and a complete gasket/hardware kit to allow for precise fitment and ease of installation. The Stainless Steel Racing Catalyst for B9 Audi S4/S5 vehicles is constructed from 304 stainless steel for maximum durability and corrosion resistance, is TIG-welded, and includes an integrated OE style heat isolation barrier to minimize exhaust heat transferred into the engine bay.

034Motorsport's Stainless Steel Racing Catalyst was developed entirely in-house on 034Motorsport's Development B9 Audi S4 utilizing the latest in 3D Scanning Technology, CAD Software, and Rapid Prototyping Techniques. Final production units were then tested extensively on track in B9 Audi S4 vehicles before release.

FEATURES:

  • Increased Horsepower & Torque Throughout the Powerband (+ 21 HP / + 33 TQ Peak)
  • Quicker Turbocharger Spool & Faster Transient Response (150-300 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 148mm Euro 4 Racing Catalytic Converter
  • 304 Stainless Steel Construction with Integrated Inlet/Outlet Flanges & O2 Sensor Bung
  • Precision CNC-Machined Flange Mating Surfaces
  • OE Style Heat Isolation Barrier
  • TIG Welded & Backpurged

WHAT'S INCLUDED:

  • 034Motorsport Stainless Steel Performance Downpipe
  • Integrated Euro 4 Racing Catalytic Converter
  • Factory Turbocharger Outlet Gasket
  • Factory Catalyst to Downpipe Gaskets (2)
  • M8 Locknuts (6)
  • M8x30 Socket Head Cap Screws (4)
  • M8 Washers (4)

034MOTORSPORT B9 AUDI S4 3.0 TFSI RACE CATALYST PERFORMANCE COMPARISONS

These Performance Comparisons were performed using an in-house 2018 Audi S4 3.0 TFSI on 91 Octane fuel.

FACTORY CATALYST (91 OCTANE) 034 RACE CATALYST (91 OCTANE)
Peak Horsepower 304 HP 320 HP
Peak Torque 332 FT-LBS 348 FT-LBS
Peak HP Gains vs. Factory Catalyst - 21 HP @ 5,680 RPM
Peak TQ Gains vs. Factory Catalyst - 33 FT-LBS @ 2,525 RPM

FACTORY CATALYST VS. 034 RACE CATALYST - 91 OCTANE

034 RACE CATALYST POWER GAINS - 91 OCTANE

SUPPORTED VEHICLES

  • 2018 - Present Audi S4 (B9)
    • 3.0 TFSI
  • 2018 - Present Audi S5 (B9)
    • 3.0 TFSI

EMISSIONS DISCLAIMER

  • This product is sold for off-road use only.
  • 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 product will cause a check engine light (MIL) on the stock factory tuning. A racing ECU calibration for offroad use only is required to eliminate the check engine light.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 63865130275

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Elizabeth
Whiting, US
★★★★★ 5
Great Mug Heat Press for Beginners and Small Businesses
Color: Blue
The HTVRONT mug heat press is very easy to use and works perfectly for sublimation mugs. It heats evenly, which helps the design transfer clearly and with vibrant colors. The temperature and time controls are simple to adjust, making it great for beginners as well as small business owners. I’ve used it on 11 oz sublimation mugs and the results are consistent and professional. The machine feels sturdy, heats up fast, and saves time when making multiple mugs. Overall, it’s a reliable and affordable option for anyone starting or growing a sublimation business. ✅ Easy to use ✅ Even heat distribution ✅ Great print quality ✅ Ideal for sublimation mugs
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Reviewed in the United States on January 27, 2026
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Douglas Knotts
Dallas, US
★★★★★ 5
Nice product
Color: White
Awesome, easy to use and very consistent
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Reviewed in the United States on June 11, 2026
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Elizabeth Woldridge
Carnegie, US
★★★★★ 5
Love it. Its Great
Color: White
The HTVRONT Auto Tumbler Heat Press Machine is a specialized tool designed for sublimation projects, particularly for customizing tumblers, mugs, and other cylindrical items ranging from 10 to 30 ounces. It's an excellent choice for both hobbyists and small business owners looking to streamline their crafting process.​ 🔧 Key Features Automatic Pressure Application: The machine automatically adjusts pressure based on the diameter of the item, ensuring consistent results without manual adjustments. ​ The How-To Home Temperature and Timer Control: Offers a temperature range up to 390°F (200°C) and includes a timer function, allowing for precise control over the sublimation process. ​ Safety Features: Equipped with an emergency stop button and an auto shut-off feature after 15 minutes of inactivity, enhancing user safety. ​ Compact Design: Measures approximately 13 x 11 x 6.3 inches and weighs around 9.5 lbs, making it suitable for home studios or small workspaces. Happiness is Homemade ​ Compatibility: Designed to accommodate items with a diameter of 2.95 to 3.35 inches, covering a wide range of tumbler and mug sizes. ​ 🧠 Final Thoughts The HTVRONT Auto Tumbler Heat Press Machine offers a blend of automation, safety, and versatility, making it a valuable addition to any crafting setup. Its user-friendly features and compact design cater to both beginners and experienced crafters, ensuring high-quality sublimation results. Sources Absolutely Love This Tumbler Press! I’ve been using the HTVRONT Auto Tumbler Heat Press Machine for a few weeks now, and it has completely exceeded my expectations. The machine is incredibly easy to use—just set your temperature and timer, and it does all the hard work for you. I love that it automatically adjusts the pressure based on the tumbler size, which has saved me so much time and effort! The results are flawless every time. I’ve used it for several sublimation projects, and the colors come out vibrant and crisp. Plus, the safety features like the auto shut-off give me peace of mind while working. The compact design also fits perfectly in my small crafting space. I highly recommend this press to anyone looking to level up their sublimation game! Durability is Great. No smell
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Reviewed in the United States on April 23, 2025
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Teira
New York, US
★★★★★ 4
So far, So good
Color: Blue
I have printed about 18 tumblers since purchasing this, all came out beautifully. It was delivered is great condition and is very easy to use. Just plug it in, set temperature and get your work started. No complaints thus far.
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Reviewed in the United States on June 9, 2026
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Angie
Chelsea, US
★★★★★ 5
Great machine
Color: Blue
Love my press I have other presses and conventional ovens to sublimate, and this is by far a wonderful machine added to my craft room
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Reviewed in the United States on June 9, 2026

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