Downpipe for Audi A4: Carbon Fibre Composite
This downpipe for the Audi A4 is specified around carbon fibre composite, which decides how it behaves in service far more than the part name does. We build to a written specification — base material, dimensions, finish and packing — and hold that specification on file so every reorder reproduces the approved piece.
The usual reason a programme changes supplier is not unit price. It is lead time that slipped twice before bulk started, or reorders that did not match the approved sample. Both are specification problems, and both are preventable.
Specification
| Product | Downpipe |
|---|---|
| Vehicle application | Audi A4 |
| Material / finish | Carbon Fibre Composite |
| Typical use | Roadside Assistance |
| MOQ | 1,000 pieces per specification |
| Sampling | 10 working days, 3 days per revision |
| Bulk lead time | 20-55 days after approval |
| Compliance | ECE R90 |
| Packing | 10 pieces per inner box, 1000 per carton |
Material options
- EPDM Rubber — specified where the part sits close to a heat source
- Reinforced Nylon — chosen where wear resistance comes first
- Titanium Alloy — specified where the part sits close to a heat source
- Ceramic Composite — specified where the part sits close to a heat source
- Chromed Steel — the cost-effective default for volume programmes
Processes available
- surface grinding
- assembly line testing
- injection moulding
- cold forging
- laser cutting
- robot welding
Fitment notes
Confirm the fitment against the VIN or the frame number before ordering; two model years often share a name and not a part.
Where it is used
The specification above is the one most often ordered for roadside assistance. Related applications include roadside assistance, construction sites, motocross, track days, ride-hailing fleets.
Quality and packing
- In-line inspection with AQL 1.5 sampling on every lot.
- Dimensional report issued against the approved drawing.
- Carton marking and barcode to your specification.
- Golden sample retained at the factory as the reorder reference.
Questions buyers ask
Can the specification be held on file?
Yes. Once approved, the specification is recorded against your part number so a reorder reproduces the ECE R90-compliant build instead of a fresh interpretation.
How long does sampling take?
Samples leave the factory in 10 working days, and each revision round adds about 3 days once you have seen the first piece.
What testing is included?
Standard lots ship with dimensional and hardness reports. ECE R90 documentation is issued with the shipment when your market requires it.
Can you match an existing sample?
Send a sample and we will reverse-engineer the specification, then produce a counter sample for approval before any bulk starts.
Ask for the current catalogue and the specification sheet for this line.
