Exhaust Downpipe · SKU 701807501058
FOR 09-12 AUDI A4/A5/Q5 QUATTRO 2.0T B8 3 Inch TURBO PIPE EXHAUST DOWNPIPE
A 3 inch mandrel bent T-304 stainless steel turbo downpipe for 2009-2012 Audi A4, A5, and Q5 Quattro 2.0T B8 models. It replaces the factory turbo pipe with a high flow non-resonated design and ships as a single piece with CNC machined flanges and O2 sensor bungs. Fitment is specific to the 2.0T turbo engine and includes B8.5 models from 2013-2016. Not intended for street use.
- MaterialT-304 Stainless Steel
- Size3 inch
- FlangeCNC machined
- WeldingTIG double side welded
What You Get
Key Benefits
- 3 inch mandrel bent T-304 stainless steel pipe reduces exhaust back pressure and improves turbo spool
- CNC machined flanges ensure a flat sealing face for leak-free operation under high load
- O2 sensor bungs allow for sensor retention without cutting or welding
- TIG welded joints provide strong, consistent weld integrity across the full pipe
- Non-resonated design increases airflow and delivers measurable gains in horsepower and torque
Why Buyers Switch
Problems It Solves
- Factory turbo pipes restrict exhaust flow and limit turbo response under boost
- Universal pipes require cutting and welding, which increases labour time and risk of leaks
- O2 sensor bungs are missing on many aftermarket pipes, requiring additional modifications
- Mild steel or low-grade stainless pipes warp or crack under repeated heat cycling
- Lack of clear fitment data leads to returns and customer disputes on online marketplaces
Where It Is Used
Application Scenarios
- Distributors stocking vehicle-specific turbo pipes for European performance parts markets
- Online sellers needing a photographed, fitment-verified part with clear exclusion notes
- Racing teams upgrading turbo flow on 2009-2012 Audi Quattro models without engine modifications
Buyers
Who It Is For
- Overseas performance parts distributors buying direct from factory for European and North American markets
- Diesel and truck accessory wholesalers serving high-performance Audi owners
- Independent installation shops that require parts with no fitment ambiguity and no welding
Construction
Technical Features
- Single piece 3 inch mandrel bent T-304 stainless steel downpipe with CNC machined flanges
- TIG double side welded joints for consistent strength and leak resistance
- O2 sensor bungs pre-installed at the outlet for sensor retention
- Direct bolt-on fitment with factory routing and mounting points
- Non-resonated design to increase exhaust flow and reduce back pressure
Data
Specifications
| Material | T-304 Stainless Steel |
|---|---|
| Size | 3 inch |
| Flange | CNC machined |
| Welding | TIG double side welded |
| Bungs | O2 sensor bungs pre-installed |
| Fitment | 2009-2012 Audi A4, A5, Q5 Quattro 2.0T B8 and B8.5 (2013-2016) |
| Exclusion | Not for street use; intended for racing and competition only |
| Inlet | 3 inch |
| Outlet | 3 inch |
Material
Materials
- T-304 stainless steel tube
- CNC machined flanges
- O2 sensor bungs
Manufacturing
How It Is Made
Mandrel bending of T-304 stainless steel tube to match factory routing
CNC machining of flanges for precise bolt hole alignment and sealing face flatness
TIG welding of flanges to tube with double side seam for strength
Installation of O2 sensor bungs at the outlet end
Final inspection for weld integrity, surface finish, and fitment against factory pattern
Checks
Quality Control
- Flange bolt pattern and sealing face checked before welding
- Weld seams inspected for pinholes and uniformity along the full joint
- Surface checked for scratches, handling marks, and finish consistency before packing
- Final fit check against factory flange pattern to confirm bolt-on compatibility
Private Label
Customisation Options
- Private label packaging and barcode labels available on request
- Bulk cartons provided for container shipments instead of individual retail boxes
Comparison
Compared With The Alternatives
| Mild steel aftermarket pipe | Mild steel is cheaper but warps under heat; T-304 stainless maintains shape and resists oxidation |
|---|---|
| Universal cut-to-fit pipe | A universal pipe requires welding and custom fitting, this one bolts on without modification |
Installation
Use Guide
- Confirm the vehicle is a 2009-2012 Audi A4, A5, or Q5 Quattro 2.0T B8 or B8.5 (2013-2016)
- Do not install on vehicles without a 2.0T turbo engine
- Replace the factory O2 sensor gasket if reusing the sensor
- Torque flange bolts evenly in a cross pattern to maintain sealing face flatness
- O2 simulators may be required if a check engine light appears after installation
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Answers
Questions About This Part
Will this fit a 2013 Audi A5 B8.5?
Yes. The part covers 2009-2012 A4, A5, and Q5 Quattro 2.0T B8 models and includes B8.5 models from 2013-2016.
Is this pipe for street use?
No. This item is intended for racing and competition purposes only and is not street legal in most markets.
What size is the pipe?
3 inch inlet and outlet. It replaces the factory turbo pipe with a direct bolt-on fit.
Are O2 sensor bungs included?
Yes. The pipe includes pre-installed O2 sensor bungs at the outlet end.
What hardware is included?
The package includes the downpipe and the hardware shown in the product images. No additional gaskets or bolts are included beyond what is pictured.
Can I get private label packaging?
Yes. Private label packaging and barcode labels are available on request. Bulk cartons are provided for container orders.
Is this compatible with 2.0T non-Quattro models?
No. The part is designed for Quattro models only and does not fit non-Quattro 2.0T Audi A4/A5/Q5 vehicles.
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