High-flow downpipe for Audi S4 / S5 B9 3.0T. Faster turbo spool, improved exhaust flow, deeper sound. 304 stainless steel, TIG welded, direct bolt-on. Global shipping.

Key Features

• Designed for Audi S4 / S5 B9 3.0T (EA839)

• 304 Stainless Steel construction

• High-flow design to reduce backpressure

• Hand TIG-welded

• Direct bolt-on installation

• Compatible with OEM & aftermarket exhausts

• Uses OEM O2 sensor ports

Product Overview

This downpipe is engineered for the 3.0T EA839 engine to improve exhaust flow and reduce restriction.
The result is quicker turbo response, stronger acceleration, and a deeper, sportier tone.

Perfect for daily driving or performance upgrades.

Performance Gains

• Faster turbo spool

• Increased exhaust flow

• Stronger mid and top-end power

• Deeper and more pronounced exhaust sound

• Reduced backpressure for engine efficiency

Sound Characteristics

• Deeper German-style tone

• Sharper acceleration sound

• Even better sound when paired with an aftermarket catback

• Sporty but not excessively loud

Specifications

• Material: 304 Stainless Steel

• Welding: TIG Welded

• Section: Downpipe (Front Pipe)

• Diameter: 3.0″ (76mm)

• O2 Sensor: Compatible with OEM sensors

• Fitment: OEM & aftermarket exhausts

Fitment

For the following models:

• Audi S4 B9 / B9.5 (2017–2024)

• Audi S5 B9 / B9.5 (Sportback / Coupe / Cabriolet)

• Engine: 3.0T EA839 V6 Turbo

Installation

• Direct bolt-on

• No cutting required

• Works with OEM O2 sensors

• Professional installation recommended

FAQ

Q: Will it trigger a CEL?
Non-catted versions may trigger a CEL. Use an O2 spacer or ECU tune.

Q: Is it compatible with stock exhaust?
Yes, 100% compatible.

Q: Will the sound increase significantly?
Deeper and more aggressive but still suitable for daily driving.

Shipping & Warranty

• DHL / UPS worldwide shipping

• Protective shock-resistant packaging

• 12-month welding & structural warranty

Upgrade the performance of your Audi S4/S5 B9.
Choose this high-flow downpipe and unlock the full potential of the EA839 engine.
Order now.

👉 Watch the full sound test video below: