Description

This ring gear (3978313) is designed for Cummins B Series engines to ensure accurate engagement with the starter motor and smooth engine cranking. Built to OEM specifications, it delivers a perfect fit and long service life. Manufactured from high-strength, wear-resistant materials, it’s ideal for commercial, agricultural, and industrial applications that require consistent and efficient starting system performance. Application: Aftermarket Cummins Flywheels B-Series Cross Reference Number: 4933355 Key Features: OEM-quality direct replacement Smooth and accurate starter engagement Designed for Cummins B Series engines High-strength, wear-resistant material Long-lasting performance and easy installation Compatibility: Specifically compatible with Cummins B Series engines. Confirm engine specifications before ordering.