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.
- 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
E1 Motorsports strives to ship "In-Stock" orders within one business day of receiving the order. Shipping times may vary depending on the contents of your order. E1 Motorsports will only ship an order once it is 100% in stock. E1 Motorsports does not ship partial orders unless requested by the customer, at which time additional shipping charges may apply. If you need your order by a specific date, it is important to contact us by phone so that we may assist you. Once you have placed your order, it is important to log into your E1 Motorsports account page to review your order status, expected ship date, order updates and order history. All dates provided are based on estimates given by the supplier. E1 Motorsports does not guarantee ship dates as delivery times are subject to change. All shipping times are based on our Monday through Friday business hours. Orders will not be shipped from our facility on Saturday or Sunday. Shipping Charges are non-refundable.
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Free Shipping Policy
Free Shipping On Orders $49+: Items marked with a 'Free Shipping On Orders $49+' logo may qualify for free standard ground shipping to the contiguous United States (48 states) for most orders with a value greater or equal to $49.00 USD. Oversized products and direct ship products are excluded from this offer unless otherwise noted.
Free Shipping: Items marked as 'Free Shipping' may qualify for free standard ground shipping to the contiguous United States (48 states). Oversized products and direct ship products are excluded from this offer unless otherwise noted.
Stock Status Policy
In-Stock: The product(s) on your order are in-stock and should be processed by our shipping department within 24 hours excluding weekends (1 business day).
Direct Ship: Your order has been submitted to the supplier. Once tracking information is provided from the supplier, your order will be updated on your account page, and the order will be marked shipped.
Sold Out: One or more parts on your order are currently unavailable. We are waiting for an accurate ETA from supplier.