Piston Ring for BYD F3: High Density Foam
This piston ring for the BYD F3 is specified around high density foam, 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 a specification nobody had written down, or a specification nobody had written down. Both are specification problems, and both are preventable.

Specification
| Product | Piston Ring |
|---|---|
| Vehicle application | BYD F3 |
| Material / finish | High Density Foam |
| Typical use | Long-Distance Touring |
| MOQ | 2,000 pieces per specification |
| Sampling | 14 working days, 3 days per revision |
| Bulk lead time | 25-55 days after approval |
| Compliance | IATF 16949 |
| Packing | 100 pieces per inner box, 200 per carton |
Material options
- Polypropylene — preferred when weight matters more than rigidity
- Silicone — the cost-effective default for volume programmes
- Nylon 66 — preferred when weight matters more than rigidity
- Tempered Glass — selected when the part is exposed to weather and road salt
- Carbon Steel — specified where the part sits close to a heat source

Processes available
- anodising
- injection moulding
- heat treatment
- robot welding
- surface grinding
- cold forging
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 long-distance touring. Related applications include wet weather riding, airport ground fleets, daily commuting, heavy load hauling, long-distance touring.
Quality and packing
- In-line inspection with AQL 2.5 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 IATF 16949-compliant build instead of a fresh interpretation.
How long does sampling take?
Samples leave the factory in 14 working days, and each revision round adds about 3 days once you have seen the first piece.
What is the minimum order quantity?
The standard MOQ is 2000 pieces per specification. Mixed sizes inside one shipment are accepted once the total reaches that figure.
How is packing specified?
Individual packing, inner box quantity and carton marking are confirmed at quotation stage so the cartons arrive ready for your warehouse.
Send the specification you are working to and we will confirm what we can match, what we would change and why.







