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Caterpillar 3300 Series Parts

Parts for the Caterpillar 3300 series — the 3304 and 3306 inline diesels that still run trucks, gensets, marine rigs, and off-highway iron decades after they left the line. JAK'S Diesel stocks cylinder heads, fuel injectors, turbochargers, gaskets, and full rebuild kits for these older mechanical engines, with PAI Industries aftermarket coverage across the platform.

Because the 3300 series is a long-running family, many factory part numbers have been superseded. Have an old CAT number off a tag, a parts book, or a competitor listing? Send it over — we cross-reference OEM, superseded, and aftermarket numbers to confirm the right part the first time. Call or text (720) 445-6249 for a quote.

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Choosing the Right Caterpillar 3300 Series 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