PRO Program members can receive tiered savings on this line—up to 20% more off for qualifying accounts.
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Built to support repair shops, fleets, and equipment owners with dependable parts sourcing and responsive service.
Qualifying new parts include 1-year coverage. Review the Warranty Policy section for coverage details, claim steps, and exclusions.
Eligible orders may qualify for returns within 90 days. See the Easy Return Policy section for conditions and next steps.
Send a question through Ask a Product Question or the contact form. Our team reviews requests on business days and follows up as quickly as possible.
| Model Number | 845B, 721D, 721E, 1150K, 1650L, 621E, 621F, 721F, 821F, 850L, 921F, 865B, 865B AWD, 885B, 621F - TIER 2 |
| Compatible Model Brand | For CASE |
| Compatible Engine Brand | For CUMMINS, For CASE |
| original | 2831274, 2831274C, 2831274R, 2831274nx, 2831274rx |
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Official answers about compatibility, package contents, specifications, installation, shipping, and warranty for ISB5.9 ISBE Complete Cylinder Head with Valves for Cummins Engine CASE Dozer 1150K 1650L 850L Loader 621E 621F 721D 721E 721F 821F 921F 845B 865B 885B (SKU: ESY27394).
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Every new aftermarket part from us includes a 1-year warranty. Full terms, coverage, and how to make a claim: Warranty Assistance.
We ship to customers around the world. Orders are sent with our standard courier service—trackable, dependable, and easy to work with. On this product page, use Get Estimate under the price to see shipping cost and estimated delivery for your location. For destinations, rules, and full details, read our Shipping Policy Details.
We want you to be confident in your order. If you are not satisfied, you may qualify for a return or refund within 90 days, subject to conditions. See our Easy Return Policy for eligibility, steps, and exceptions.
