Downpipe for BMW 3 Series: Stainless Steel
This downpipe for the BMW 3 Series is specified around stainless 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 reorders that did not match the approved sample, or lead time that slipped twice before bulk started. Both are specification problems, and both are preventable.
Specification
| Product | Downpipe |
|---|---|
| Vehicle application | BMW 3 Series |
| Material / finish | Stainless Steel |
| Typical use | Daily Commuting |
| MOQ | 200 pieces per specification |
| Sampling | 7 working days, 5 days per revision |
| Bulk lead time | 20-55 days after approval |
| Compliance | DOT |
| Packing | 100 pieces per inner box, 500 per carton |
Material options
- Brass — selected when the part is exposed to weather and road salt
- Forged Aluminium — selected when the part is exposed to weather and road salt
- Kevlar Composite — the cost-effective default for volume programmes
- Anodised Aluminium — used when the finish has to hold a coating
- Chromed Steel — the cost-effective default for volume programmes
Processes available
- assembly line testing
- shot blasting
- electroplating
- heat treatment
- sintering
- rubber vulcanisation
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 daily commuting. Related applications include rental fleets, coastal delivery, security patrols, night riding, airport ground fleets.
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 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 7 working days, and each revision round adds about 5 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 testing is included?
Standard lots ship with dimensional and hardness reports. DOT documentation is issued with the shipment when your market requires it.
Tell us the model, the fitment and the quantity and we will hold a production slot for you.
