Cummins 5579421 XPI Common Rail Fuel Injector 4327147 for Cummins X15 / ISX15 / QSX15

1. Overview

The Cummins 5579421 is an XPI common rail fuel injector for the Cummins X15 / ISX15 / QSX15 (EPA 2017+, XPI Acadia platform). It is the same injector as 4327147 (Cummins cross-reference table), and the Interstate-McBee XPI kit table pairs it with the earlier kit number 2897518. The remanufactured form carries the SE suffix (5579421SE). Note: XPI injectors are Cummins-made — there is no Bosch equivalent number for this injector. 100% brand new, bench-tested before dispatch and built to OE specification.

2. Specifications

• Part Number: Cummins 5579421
• Type: XPI common rail diesel fuel injector (Cummins XPI system)
• Condition: 100% brand new
• Warranty: 6 months (core injector)

3. Fitment

• Engines: Cummins X15 / ISX15 / QSX15 (EPA 2017+, XPI Acadia)
• for reference only — please confirm by the number engraved on your old injector or send us your VIN before ordering.

4. Cross-Reference

5. After-Sales & Warranty

Every injector is bench-tested before dispatch. If you receive a defective item or the wrong model, contact us within 15 days for a return or exchange (return shipping is on the buyer unless the error is ours). Core injectors carry a 6-month warranty and wear parts 3 months. Orders are processed in 1–2 business days and shipped with tracking; refunds are issued within 7 business days after the returned item passes inspection. Professional installation by a diesel technician is strongly recommended.

6. Why Choose Us

Wuhan Ranyingyi Trading Co., Ltd. (injector-factory.com) supplies diesel fuel injectors factory-direct. Free fitment check: send a photo of the engraving on your old injector or your VIN on WhatsApp (+86 156 3802 2858) and we confirm the exact match before you order. Fast response, careful packing and worldwide shipping.

FAQ

1. Does the price include shipping? No. This item is Price: On Request — contact us on WhatsApp (+86 156 3802 2858) for the latest price. Prices do not include freight; the freight cost is confirmed with you on WhatsApp after you place the order, based on your destination and quantity.

2. Are 4327147 and 2897518 the same injector as 5579421? 4327147 is the Cummins cross number for this same XPI injector, and 2897518 is the earlier kit number paired with 5579421 in the Interstate-McBee kit table. Still, always order by the number engraved on your old injector, or send us the engraving photo / your VIN on WhatsApp for a free check.

3. What warranty do I get? A 6-month warranty on the injector (3 months on wear parts). Defective or wrong items can be returned or exchanged within 15 days — see After-Sales & Warranty above.