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Cummins ISC & ISL Parts

Parts for the Cummins ISC and ISL — the 8.3L and 8.9L mid-bore workhorses found in medium-duty trucks, RVs, buses, and vocational equipment. We stock the high-wear components that keep these engines running: cylinder heads, fuel injectors, turbochargers, head gaskets, and complete rebuild kits, with PAI Industries aftermarket coverage backing nearly 200 line items on this platform.

Not sure a number fits your ISC or ISL? Give us the OEM, competitor, or superseded part number and we'll cross-reference it. We ship same-day from Colorado with free freight over $1,000. Call or text (720) 445-6249 for a quote.

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Choosing the Right Cummins ISC & ISL 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