Air Box for Subaru Outback: Polypropylene
This air box for the Subaru Outback is specified around polypropylene, 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 inconsistent hardness between lots, or lead time that slipped twice before bulk started. Both are specification problems, and both are preventable.

Specification
| Product | Air Box |
|---|---|
| Vehicle application | Subaru Outback |
| Material / finish | Polypropylene |
| Typical use | Delivery Fleets |
| MOQ | 1,000 pieces per specification |
| Sampling | 7 working days, 3 days per revision |
| Bulk lead time | 25-30 days after approval |
| Compliance | SGS |
| Packing | 10 pieces per inner box, 500 per carton |
Material options
- Chromed Steel — preferred when weight matters more than rigidity
- Brass — selected when the part is exposed to weather and road salt
- Zinc Plated Steel — used when the finish has to hold a coating
- Semi-Metallic Compound — the cost-effective default for volume programmes
- Neoprene — preferred when weight matters more than rigidity

Processes available
- powder coating
- gravity casting
- anodising
- shot blasting
- die casting
- CNC machining
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 delivery fleets. Related applications include airport ground fleets, track days, weekend riding, wet weather riding, heavy load hauling.
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
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.
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.
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 is packing specified?
Individual packing, inner box quantity and carton marking are confirmed at quotation stage so the cartons arrive ready for your warehouse.
Tell us the model, the fitment and the quantity and we will hold a production slot for you.







