Downpipe for GMC Sierra: Cast Iron
This downpipe for the GMC Sierra is specified around cast iron, 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 a specification nobody had written down. Both are specification problems, and both are preventable.
Specification
| Product | Downpipe |
|---|---|
| Vehicle application | GMC Sierra |
| Material / finish | Cast Iron |
| Typical use | Night Riding |
| MOQ | 1,000 pieces per specification |
| Sampling | 10 working days, 5 days per revision |
| Bulk lead time | 20-55 days after approval |
| Compliance | ISO/TS 16949 |
| Packing | 10 pieces per inner box, 200 per carton |
Material options
- Stainless Steel — the cost-effective default for volume programmes
- Bronze — used when the finish has to hold a coating
- High Density Foam — specified where the part sits close to a heat source
- Sintered Metal — used when the finish has to hold a coating
- Natural Rubber — chosen where wear resistance comes first
Processes available
- powder coating
- gravity casting
- assembly line testing
- precision stamping
- sintering
- surface grinding
Fitment notes
Check whether the mounting points on your market version match the catalogue drawing — regional variants are the usual cause of a wrong first order.
Where it is used
The specification above is the one most often ordered for night riding. Related applications include urban courier work, track days, coastal delivery, mining sites, adventure travel.
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
Do you handle mixed containers?
Yes. Most programmes consolidate several part numbers into one container to keep freight sensible at 1000 pieces per line.
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 5 days once you have seen the first piece.
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.
Send the specification you are working to and we will confirm what we can match, what we would change and why.
