PIAA's 510 Super White Driving kit features 55 watt = 85 watt bulbs and exceeds SAE standards. At four inches in diameter, the 510 is a natural for today's cars and trucks with round openings in the bumper or front spoiler. These lamps are encased in a black stamped steel housing and feature a hardened quartz glass lens. This kit comes complete with two lamps, pre-assembled wiring harness which includes the relay and switch, and two black mesh covers. It's easy to install and no cutting or splicing is required. These lamps are engineered to perform anywhere, at any time and in any condition and are backed by limited lifetime warranty. PIAA's number one selling lamp series. The compact and ultra-thin housing provides for a multitude of applications. With its 4 inch diameter the 510 Series is a natural for today's cars and trucks with round openings in the bumper or grill.