C7/C9 · HEUI injector external seals
C7 / C9 Injector External Repair Kit

Photo shows the part type this kit services — kit contents are listed per order, not shown.
New · Supplied by BOSTEN · MOQ Please inquire
External kit covering the parts you touch when swapping injectors on the valve cover: body O-rings, tube seals and connector seals. Popular with workshops doing full-sets — one kit per injector keeps oil and fuel where they belong.
Fitment is listed, not guaranteed. Applications are compiled from catalog and cross-reference data. Fitment is confirmed by our team against the old part number and engine serial before quotation — not an automated lookup.
Specifications
Identity, fitment and packing
| Part number | C7/C9 external kit |
|---|---|
| Condition | New |
| Fuel system | HEUI injector external seals |
| Unit weight | Confirmed per order |
| Packing | Confirmed per order |
| MOQ | Please inquire |
| Warranty | Warranty terms are confirmed per order and stated on the quotation. |
Fitment — listed applications
- CAT C7 / C9 (HEUI) injectors — kit contents confirmed per order
Kit contents vary by kit version — request the parts list before ordering.

Before dispatch
Checked, photographed, packed
Units are inspected on named test equipment before packing. Photos of your actual goods are taken before shipment, and a test report for the ordered batch is available on request.
Quality & testingProduct FAQ
Questions buyers ask about C7/C9 external kit
Is the C7/C9 external kit new, remanufactured or used?
The C7/C9 external kit is supplied new. Kit contents are matched to the revision of the injector or pump it serves, so the exact contents list is confirmed against your old part number before quotation — ask for the list and we send it in writing.
How do I confirm the C7/C9 external kit matches my parts?
Fitment is listed, not guaranteed. Listed applications: CAT C7 / C9 (HEUI) injectors — kit contents confirmed per order. Send the number stamped on your old unit, the engine model and serial, and — where the stamping is worn — a photo of the old part. We check it against the catalog manually and confirm in the quotation. The machine or engine model alone does not select the part.
What is the minimum order quantity for the C7/C9 external kit?
MOQ for this part is quoted per order. Send the quantity you need and the destination, and the quantity we can actually ship goes into the quotation.
Is the C7/C9 external kit an OEM Caterpillar part?
The C7/C9 external kit is an independent aftermarket replacement part, manufactured for BOSTEN and sold under our own brand. It is not a Caterpillar OEM part, and BOSTEN is not an authorized Caterpillar distributor or dealer. Caterpillar names and part numbers appear on this page for identification and cross-reference only.
Can you check my old part number against the C7/C9 external kit?
This listing does not publish a cross-reference list for the part. Send the number on your old unit and we check it against the catalog manually — that check is done by our team, not by a lookup box on this page.
What warranty applies to the C7/C9 external kit?
Warranty terms are confirmed per order and written on the quotation before payment. Different product lines and conditions carry different periods, so the terms for this part are not printed here as a generic number. Damage from contaminated oil or fuel and incorrect installation are excluded under the terms confirmed for your order.
What is included in the C7/C9 external kit?
Contents are matched to the injector or pump revision the kit serves, and the parts list is sent in writing before you order. The photograph on this page shows the kit type, not the individual contents — request the list for your revision and we confirm it against your old part number.
Terms behind these answers: warranty & shipping · testing & packing. Fitment questions go to our technical team.
Related guides



