Downpipe for BYD F3: Zinc Plated Steel
This downpipe for the BYD F3 is specified around zinc plated steel, 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 fitment that looked right on paper and failed on the bench, or documentation that arrived after the container shipped. Both are specification problems, and both are preventable.

Specification
| Product | Downpipe |
|---|---|
| Vehicle application | BYD F3 |
| Material / finish | Zinc Plated Steel |
| Typical use | Urban Courier Work |
| MOQ | 3,000 pieces per specification |
| Sampling | 10 working days, 3 days per revision |
| Bulk lead time | 15-40 days after approval |
| Compliance | ISO/TS 16949 |
| Packing | 10 pieces per inner box, 200 per carton |
Material options
- Powder Coated Steel — the cost-effective default for volume programmes
- Cast Iron — specified where the part sits close to a heat source
- Carbon Steel — used when the finish has to hold a coating
- ABS Plastic — chosen where wear resistance comes first
- Kevlar Composite — specified where the part sits close to a heat source

Processes available
- powder coating
- ultrasonic cleaning
- electroplating
- precision stamping
- laser cutting
- assembly line testing
Fitment notes
Keep the old part until the new one is on the bench. Comparing them side by side settles questions a photograph never will.
Where it is used
The specification above is the one most often ordered for urban courier work. Related applications include construction sites, delivery fleets, farm use, night riding, roadside assistance.
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
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.
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.
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.
What happens if a lot fails inspection?
The lot is re-inspected against the golden sample, and replacement pieces ship on the next available booking at our cost.
Send the part number, the annual volume and the target market, and we will come back with a specification and a sampling plan.







