Synapse DV Hyundai Genesis - without BOV - only accessories DV Series Synchronic BOV For Hyundai Genesis, only accessories - without BOV! The new DV Synchronics of Synapse is the first compact BOV, which operates with a piston valve that works without permanent lubrication. Due to the new technology, it works very fast and is recommended by the compact construction especially in tight spaces. At present, it is the fastest BOV which is available on the market.