Description

This ring gear (3910903) is designed for Cummins B Series engines to deliver precise engagement with the starter motor, ensuring consistent and efficient engine starts. Built to OEM specifications, it offers a perfect fit and dependable operation. Made from high-strength, wear-resistant materials, it is ideal for commercial trucks, agricultural equipment, and industrial applications requiring reliable engine performance. Application 1: 3946387 Aftermarket Cummins B Series Flywheel 3.9 L / 5.9 L, B-Series Cross Reference Numbers: 3942798 3923099 3920379 3901395 Flywheel Bolt 3900269 Flywheel Bolt Washer Key Features: OEM-quality direct replacement Accurate and smooth starter engagement Designed for Cummins B Series engines Wear-resistant and long-lasting build Easy to install with precise fitment Compatibility: Specifically compatible with Cummins B Series engines. Confirm engine specifications before purchase.