Simple plug and play harness that turns your single DRL and single Turn signal bulbs into a Dual bulb setup. The optional bulb types available on the listing allow for a choice of dual White/White, Amber/Amber, or White/Amber Switchback (most popular) function. Wire Harness: 2x Sparksmith Exclusive DoubleShot harnesses with integrated resistors. LED BULBS (OPTIONAL): 2 pairs of 3157 bulbs …Read more »