Silencer Box for GMC Sierra: Neoprene
This silencer box for the GMC Sierra is specified around neoprene, 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 packing that arrived crushed at the port, or documentation that arrived after the container shipped. Both are specification problems, and both are preventable.

Specification
| Product | Silencer Box |
|---|---|
| Vehicle application | GMC Sierra |
| Material / finish | Neoprene |
| Typical use | Motocross |
| MOQ | 2,000 pieces per specification |
| Sampling | 10 working days, 5 days per revision |
| Bulk lead time | 25-40 days after approval |
| Compliance | CCC |
| Packing | 10 pieces per inner box, 1000 per carton |
Material options
- Natural Rubber — the cost-effective default for volume programmes
- Reinforced Nylon — used when the finish has to hold a coating
- Carbon Steel — preferred when weight matters more than rigidity
- Semi-Metallic Compound — preferred when weight matters more than rigidity
- Brass — specified where the part sits close to a heat source

Processes available
- gravity casting
- electroplating
- cold forging
- anodising
- shot blasting
- heat treatment
Fitment notes
Confirm the fitment against the VIN or the frame number before ordering; two model years often share a name and not a part.
Where it is used
The specification above is the one most often ordered for motocross. Related applications include construction sites, delivery fleets, farm use, adventure travel, wet weather riding.
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
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.
How long does sampling take?
Samples leave the factory in 10 working days, and each revision round adds about 5 days once you have seen the first piece.
Do you handle mixed containers?
Yes. Most programmes consolidate several part numbers into one container to keep freight sensible at 2000 pieces per line.
What testing is included?
Standard lots ship with dimensional and hardness reports. CCC 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.







