Downpipe for Audi A4, A6 1.8T B5, Passat 1.8T 3B, 3BG, ø 63mm (2.5"), FWD, made of stainless steel

63mm Stainless Steel Downpipe for Audi A4 B5, A6 C5, Passat 1.8T, and Skoda Superb – up to 330 PS for front-wheel drive

Product Description

This high-quality stainless steel downpipe with a 63 mm pipe diameter is suitable for various 1.8T turbo engines from Audi, VW, and Skoda. It replaces the original downpipe between the catalytic converter and the exhaust system and, thanks to the increased pipe cross-section, provides optimized exhaust flow.

With a diameter of 63 mm instead of the stock 54 mm , the downpipe can reduce exhaust backpressure and relieve the turbocharger in appropriately tuned engines. In combination with other tuning components and suitable engine software, depending on the vehicle, turbocharger, and components used, , power outputs of up to approx. 330 PS be achieved.

The downpipe features an integrated interlock flexible pipe as well as matching brackets for mounting on the vehicle. The pipe is predominantly curved and is welded only in the area of the flexible hose and the flange connections.

Technical Details

• Stainless Steel Downpipe / Y-Pipe
• Pipe diameter: 63 mm
• Original pipe diameter: approx. 54 mm
• Integrated Interlock Flexible Pipe
• Mounts included
• Optimized exhaust flow thanks to a larger pipe cross-section
• Suitable for various 1.8T tuning conversions
• Suitable for power outputs up to approx. 330 PS, depending on the vehicle and components

Connection to the exhaust system

The downpipe is installed between the catalytic converter and the rest of the exhaust system.

The following installation options are available:

• Use with the original catalytic converter
• Combine with our Plug & Play 200-CPI Sport Catalytic Converter, Part Number 340106

When using the original exhaust system, due to the different pipe diameters, a reducer sleeve from 63 mm to 54 mm is required.

For vehicles equipped with a larger sports exhaust system, the downpipe can be connected directly or with appropriate modifications, depending on the pipe diameter.

Note: Depending on the vehicle, exhaust system, and components used, modifications may be necessary. Please check the existing connections and installation dimensions before purchasing.

Compatible with the following vehicles

• Audi A4 B5 (Type 8D) 1.8T – 150–180 hp for front-wheel drive
• Audi A6 C5 (Type 4B) 1.8T – 150–180 hp for front-wheel drive
• Skoda Superb 3U4 1.8T – 150 PS, engine code AWT for front-wheel drive
• VW Passat B5 (Type 3B) 1.8T for front-wheel drive
• VW Passat B5 GP (Type 3BG) 1.8T – 150 PS, engine codes AEB / APU / ANB for front-wheel drive

Suitable for the following upgrade turbochargers

The downpipe is suitable, among other things, for conversions with the following turbochargers:

• Borgwarner KKK K04-015 – 53049880015
• Borgwarner KKK K04-015 / K06
• Borgwarner KKK K04-015 with TFSI compressor wheel

Please note that actual compatibility depends on the specific turbocharger model, the vehicle model, and the exhaust system used.

Advantages of the 63-mm downpipe

• Larger pipe cross-section than in the stock system
• Potential for reducing exhaust backpressure
• Optimized exhaust flow for performance-tuned 1.8T engines
• Suitable for various turbo upgrades
• Stainless steel construction for use in the exhaust system
• Flexible application for custom tuning projects

Registration / TÜV

A general operating permit or a parts certification is not available.

For a possible individual approval under § 21 StVZO, please contact your local TÜV inspector before purchasing. Eligibility for registration depends on the specific vehicle, the exhaust system, the emission values, and the applicable legal requirements.