XKGlow Error Canceller Capacitor Lite Elite RGB headlight bulbs (2-in-1) in 9004 fit vehicles requiring that bulb family and provide error-cancelling circuitry for LED retrofits. These 2-in-1 bulbs combine multi-color RGB functionality with a capacitor module to address electronic compatibility in many stock systems. They’re aimed at users upgrading headlights while avoiding common error codes or flicker.
XK Glow Error Canceller Capacitor Lite Elite RBG Headlight Bulbs (2 in 1) - 9004