The Cummins 3944838 V-Ribbed Belt is a genuine OEM replacement part engineered for optimal performance in various Cummins engines. This durable multi-rib belt is specifically designed for 4B3.9, 4BT3.9, 4BTA3.9, 6B5.9, 6BT5.9, and 6BTA5.9 series engines. It ensures reliable power transmission and is a direct replacement for the superseded part number 3918629. With precise dimensions, this V-ribbed belt guarantees a perfect fit and long-lasting operation, maintaining engine efficiency.