Piston for Audi A4: Natural Rubber
This piston for the Audi A4 is specified around natural rubber, 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 packing that arrived crushed at the port, or packing that arrived crushed at the port. Both are specification problems, and both are preventable.
Specification
| Product | Piston |
|---|---|
| Vehicle application | Audi A4 |
| Material / finish | Natural Rubber |
| Typical use | Daily Commuting |
| MOQ | 200 pieces per specification |
| Sampling | 7 working days, 3 days per revision |
| Bulk lead time | 25-30 days after approval |
| Compliance | E-mark |
| Packing | 10 pieces per inner box, 1000 per carton |
Material options
- Polypropylene — used when the finish has to hold a coating
- Cast Iron — used when the finish has to hold a coating
- Forged Aluminium — specified where the part sits close to a heat source
- Aluminium Alloy — selected when the part is exposed to weather and road salt
- Carbon Steel — preferred when weight matters more than rigidity
Processes available
- injection moulding
- gravity casting
- ultrasonic cleaning
- rubber vulcanisation
- precision stamping
- powder coating
Fitment notes
Check whether the mounting points on your market version match the catalogue drawing — regional variants are the usual cause of a wrong first order.
Where it is used
The specification above is the one most often ordered for daily commuting. Related applications include ride-hailing fleets, heavy load hauling, weekend riding, mining sites, wet weather riding.
Quality and packing
- In-line inspection with AQL 4.0 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
How long does sampling take?
Samples leave the factory in 7 working days, and each revision round adds about 3 days once you have seen the first piece.
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.
What is the minimum order quantity?
The standard MOQ is 200 pieces per specification. Mixed sizes inside one shipment are accepted once the total reaches that figure.
What testing is included?
Standard lots ship with dimensional and hardness reports. E-mark documentation is issued with the shipment when your market requires it.
Send the specification you are working to and we will confirm what we can match, what we would change and why.
