The H4 to H9 and H11 adapter is a practical solution for lights with an H4 connector. Designed to accompany the VX Series LED Headlight, this adapter allows the H4 plug to be connected to H9/H11 (Low/High) factory harnesses. It effectively removes electrical interference and is a factory upgrade part that fits lights with an H4 connector. With its seamless compatibility and functionality, this adapter enhances the performance and practicality of your lighting system.