The product is a genuine OEM timing chain guide rail for the 2018-2023 Audi S4 3.0 engine. Made in Germany, this part ensures proper timing chain function for optimal engine performance. With OE/OEM part numbers 06M109513G, 06M109513, and 06M-109-513-G, and manufacturer part numbers 06M109513J and 06M-109-513-J, this guide rail is designed to meet the specific needs of the Audi S4 engine.