Select Model
US
100k+ Customers' Top Choice
Chosen by over 100,000 customers for trusted quality and exceptional service.
1 Year Warranty
Enjoy a full year of warranty, ensuring long-lasting reliability and peace of mind.
90-Day Return
Hassle-free 90-day return policy for a risk-free shopping experience.
24/7 Service
Round-the-clock support to assist you whenever you need it.
Flywheel 3999603 for Cummins Engine ISDE ISBE QSB 4B 4BT 4BTA 6B 6BT 6BTA 5.9
Replace Part Number: 3999603, C3999603
Fit for Engine: Cummins ISDE, ISBE, QSB, 4B, 4BT, 4BTA, 6B, 6BT, 6BTA, 5.9
| Brand: | FridayParts |
| Compatible Engine Brand: | For CUMMINS |
| Engine Number: | 4BT, 6BT, ISDE, QSB, 6B, 6BTA, 4B, 4BTA, ISBe |
| Replacement Part Number: | 3999603, C3999603 |
Ships to:
Delivery:
Choose options for shipping rates.