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Product Description:
The HPerformance 4-inch (101.6 mm) downpipe comes directly from the development of our quarter-mile vehicle and is now ready for series production. It is the world’s first downpipe built entirely with this pipe diameter. It starts at the turbo outlet and thus replaces the stock pre-catalytic converter. Our TÜV-approved downpipe comes with two 400-cell catalysts that can be used well beyond the TÜV-certified range (600 hp) and also incorporates OPF filters. We also install this variant in the approved performance levels with 707 hp across all OPF models.
The downpipe goes in exchange for the standard downpipe. Especially with the OPF models, there is a clearly noticeable difference between 3.5 inch / 88.9mm and 4 inch / 101.6mm in exhaust back pressure and temperature recordings. On average, the exhaust backpressure 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 variant is on average 15 °C below the 3.5-inch variant.
These advantages are now also available for the road, as the downpipe has been made ready for series production.
Any change to catalytic converters (replacement, change of cells or size - different from the original state) requires a software adaptation of the engine control unit. With our remote flash solution, we also offer suitable tuning for the DNW 2.5 TFSI.
Important: Our so-called TÜV catalysts / TÜV downpipes are delivered without TÜV documentation. When used in combination with our performance software, they meet the requirements for TÜV registration and can be registered at our facility or at one of our authorized dealers. Without this registration and our software, the downpipe is not legally permitted for use on public roads.
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.
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