This valve spring retainer fits perfectly with Cummins engines ISX and QSX X15. It is an OE/OEM part number and manufacturer part number 3680884, made in China. The item included is a valve spring retainer, suitable for use in valve guides, springs and parts, and valvetrain components. With a country/region of manufacture in China, this valve spring retainer is a reliable and durable choice for your engine. Purchase this valve spring retainer now, and ensure the optimal functioning of your Cummins engine.