Timing Chain Guides. Mity are committed to sourcing parts of OE quality or beyond, that’s why thousands of professionals trust Mity parts. Cross Reference: OE: A1030520616, A1030520416, A1030520816, 1030520…. We are committed to keeping our prices as low as possible, and protecting our customers with long guarantees. This product comes with free 30-day no quibble returns (UK only).