From HPerformance GmbH

4" (101.6 mm) RACE Downpipe with 100/400 Zeller Catalysts + OPF Simulator for Audi RS3 8Y - DNW

Regular price €3,509.95
Regular price Sale price €3,509.95
4.9 · 167 Google reviews
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incl. VAT.
Estimated delivery: 16.11.2026 - 19.11.2026
* International delivery times may vary.
Cat variant: 400 Zeller Kat
Regular price €3,509.95
Regular price Sale price €3,509.95
Product details:
  • Catalytic converters in combination with 100 or 400 cell cat modules under the vehicle
  • Up to 30% less exhaust back pressure than comparable 3.5 inch downpipes
  • Designed for up to 850 hp 
  • Continuous 4 inch 101.6mm to 2 x 3 inch 76mm 
  • Manufactured in 1.4301 stainless steel
  • 1:1 interchangeable with standard downpipe
  • Suitable for all 2.5 TFSI 400PS OPF models 
Scope of delivery:
  • 1 x 4 inch / 101.6mm exhaust tailpipe / Y-pipe / downpipe
  • 1 x Y-piece adapter with V-band
  • 2 x catalytic converters with 100 or 400 cell catalytic converters (please select)
  • 1 x V-band ring / clamp
  • 6 M8 screws
  • 2 x gasket for triangular flanges
  • HPerformance OPF-/Lambda Simulator 

 

Product description:
The HPerformance 4 inch 101.6mm downpipe comes directly from the development of our 1/4 mile vehicle into series production. It is the first downpipe in the world to be built in this pipe diameter throughout. It starts at the turbo outlet and replaces the standard pre-catalytic converter.

The downpipe is an exchange for the standard downpipe. On average, the exhaust back pressure of the 4-inch OPF downpipe is another 119 millibars (mbar) below the level of a 3.5-inch variant. The exhaust gas temperature under continuous load with the 4-inch version is on average 15 °C below the 3.5-inch version.

Any modification to catalytic converters (replacement, change of cells or size - different from original condition) requires a software adjustment of the engine control unit or the use of our OPF / Lambda Simulator (not included). This prevents errors from occurring.




Manufacturer: HPerformance
Motor version: RS3 8Y - DNWC, RS Q3 - DNWC, TTRS RS3 - DNWA
Model: RS3 8V (2018-2020), RS3 8Y (2021-202X), RSQ3 (2019-2020), TTRS 8S (2020-2023)

Unless otherwise indicated, all articles and services are racing articles without guarantee / warranty and without STVO approval.

The same applies to modifications made to the vehicle. The performance figures provided are averages based on ARAL 102 OCTANE fuel; they may vary depending on the use of lower-quality fuel or wear and tear on the vehicle.
No acceleration times are guaranteed. Using the wrong type of fuel at a later date may cause damage to the vehicle. No warranty or guarantee is provided for this!
HPerformance assumes no liability for mobility guarantees or costs incurred during the modification period, nor for any resulting delays.
Scheduled timeframes are not binding and may vary as needed.

All services are custom-made and one-of-a-kind products that are excluded from the statutory right of return.
No warranty is provided for products that are not installed in a specialized workshop by trained professionals.
Work on motor vehicles may only be performed by trained professionals. Installation errors can lead not only to product malfunctions but also to dangerous technical and, in some cases, legal consequences for the vehicle.
Therefore, please have all modifications performed by a certified automotive repair shop affiliated with the trade guild.

If installation instructions for a product are not available for download in the online store, they are not available.
- Installation advice or instructions are not provided over the phone.

If vehicles have been modified previously, additional costs may apply. Please note that our TÜV-approved/registrable products are not necessarily compatible with products from other manufacturers for registration purposes ! Please verify in advance whether any hardware components you have already installed—that are not from HPerformance—can be registered as TÜV-compliant when used with our products!


Discoloration occurs on the silencers, pipe and tailpipe of all exhaust system components during operation. These are material-related changes that are not covered by the warranty/guarantee of the item and have no negative effect on the use or technical properties of the item.