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Caterpillar C10 & C12 Parts

Parts for the Caterpillar C10 and C12 — the mid-range inline-six platform that powered a generation of on-highway trucks and buses before the ACERT era. We stock the wear items and rebuild parts these engines need: cylinder heads, fuel injectors, turbochargers, gaskets, and complete rebuild kits, with PAI Industries aftermarket and OEM-equivalent coverage.

Not sure which part fits your serial or arrangement? Send us the OEM or competitor number and we'll cross-reference it. Same-day shipping from Colorado, free freight over $1,000.

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Choosing the Right Caterpillar C10 & C12 Parts

Heavy-duty diesel components must be matched to the exact engine and application. Before ordering from this collection, verify the part number, engine model, engine serial number, and any casting or calibration number shown on the original component.

Fitment information to have ready

  • OEM, dealer, casting, or interchange part number
  • Engine manufacturer, model, and engine serial number (ESN)
  • Truck year and model when the component is chassis-specific
  • Core details for remanufactured or exchange components

Need a fitment check?

Use the OEM cross-reference tool or text a clear photo of the part tag to (720) 445-6249. A JAK'S Diesel specialist can confirm the match before the part ships.

Got a Number We Don't List?

Text a photo of the part tag — a specialist crosses it and quotes you fast.

Text a Part-Tag Photo(720) 445-6249