Silencer Box for GMC Sierra: Anodised Aluminium
This silencer box for the GMC Sierra is specified around anodised aluminium, 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 warranty claims traced back to a single lot, or a supplier who changed material without saying so. Both are specification problems, and both are preventable.

Specification
| Product | Silencer Box |
|---|---|
| Vehicle application | GMC Sierra |
| Material / finish | Anodised Aluminium |
| Typical use | Farm Use |
| MOQ | 1,000 pieces per specification |
| Sampling | 10 working days, 3 days per revision |
| Bulk lead time | 25-30 days after approval |
| Compliance | RoHS |
| Packing | 50 pieces per inner box, 500 per carton |
Material options
- Cast Iron — chosen where wear resistance comes first
- Ceramic Composite — used when the finish has to hold a coating
- Natural Rubber — chosen where wear resistance comes first
- EPDM Rubber — selected when the part is exposed to weather and road salt
- Brass — specified where the part sits close to a heat source

Processes available
- surface grinding
- laser cutting
- heat treatment
- die casting
- CNC machining
- 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 farm use. Related applications include weekend riding, daily commuting, food delivery, adventure travel, rural transport.
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
What is the minimum order quantity?
The standard MOQ is 1000 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. RoHS documentation is issued with the shipment when your market requires it.
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.
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.
Ask for the current catalogue and the specification sheet for this line.







