How do I confirm pilotpart556371 fits my machine?

Compare the OEM or reference part number, machine model, engine model, and serial number. You can also submit a fitment inquiry before ordering.

In Stock

Head Repair Kit of Air Brake Compressor 9111539387 for Cummins Engine ISL ISL8.9 ISC QSB ISB

For Cummins Repair Kit

Repair Kit ISL8.9 for Cummins

OEM / REF: ISL8.9SKU: pilotpart556371

Head Repair Kit of Air Brake Compressor 9111539387 for Cummins Engine ISL ISL8.9 ISC QSB ISB is a Repair Kit replacement part for Cummins Seals, Filters & Maintenance Parts, categorized under Seals, Filters & Maintenance Parts > Repair Kit. Use OEM part number ISL8.9 and confirm machine model, engine model, and seri...

Stock: In stock
Condition: New
Fitment: Cummins Seals, Filters & Maintenance Parts
Category: Repair Kit

Fitment support before you order
Worldwide delivery options

In stock — ready to order

$114.00USD/EA

Estimated delivery by quantity

Estimated delivery windows
Qty	Estimated delivery
1	Oct 22 – Oct 29
10	Oct 20 – Oct 27
50	Oct 18 – Oct 25

Estimates from today; confirm exact lead time before payment.

Quantity

Confirm fitment before ordering →

Lead times can vary by freight route and customs. Contact support for expedited shipping.

Repair Kit Description

The product belongs to Seals, Filters & Maintenance Parts > Seal Kits > Repair Kit, making it useful when comparing related seals, filters & maintenance parts Repair Kit options for Cummins Seals, Filters & Maintenance Parts.

Additional cross references on file: 9111539387. If your machine plate shows a different number, submit a fitment inquiry with photos before checkout.

Part Numbers and Cross References

ISL8.9 9111539387

Fitment Notes

Brand or application signal: Cummins Seals, Filters & Maintenance Parts
Product family: Repair Kit
System category: Seals, Filters & Maintenance Parts > Seal Kits > Repair Kit
Recommended verification: OEM number, engine model, serial number, old part photos, and dimensions.

Shipping & Returns

Availability: InStock
Shipping: Shipping quotes can be confirmed before payment for heavy or urgent orders.
Returns: Returns are easier when fitment is confirmed before ordering.
B2B support: Bulk, fleet, and repair-shop requests can be handled through the inquiry form.

Frequently Asked Questions

How do I confirm this part fits my machine?

Match the OEM or reference number first, then verify machine model, engine model, serial number, connector layout, mounting points, and old part photos.

Can I order if my part number is not listed?

Yes. Send the old part number, machine plate, and photos through the fitment inquiry form. Support can review possible replacements or alternatives.

Is this an OEM part?

Products are indexed as replacement parts unless explicitly marked otherwise. Always compare reference numbers and confirm fitment before purchase.