This tuned vibration damper is a must-have for Cummins 4BT, 6BT, 6CT8.3, and 6D114 engines. It is designed to enhance the performance of your engine and ensure its smooth operation. The damper is made of high-quality materials and is built to last. It comes with interchange and OE/OEM part numbers 3914450 and 3925560 respectively, and is compatible with superseded part number 3914450. The vibration damper is a crucial component for any engine and this one is no exception. It is perfect for those who want to improve their engine's performance and reliability. Whether you're a professional mechanic or a DIY enthusiast, this tuned vibration damper is a great choice for your Cummins engine.