HS1 (H4) H.I.D. Conversion Kit..... Convert ordinary headlights into extraordinary headlights with the new PIAA H.I.D. Conversion Kits. PIAA H.I.D. Conversions offer a performance-driven 6000 Kelvin - just the right temperature to give maximum output (three to four times the output of stock bulbs) while producing an eye-saving daylight color..... Ease of installation is a hallmark of PIAA, and the H.I.D. headlight conversions are no exception. PIAA H.I.D. Conversion Bulbs come with the most compact and lightest ballast of any conversion kit available making it easy to install. The relay harness provides protection for switches and draws power directly from the battery for maximum performance..... PIAA offers the most durable and well-tested H.I.D. bulbs and lamps and backs them with a 2 year unconditional warranty. PIAA H.I.D. bulbs and lamps are so dependable, and perform so well, that they are the choice of many professional racers....... PIAA H.I.D. Conversion Bulbs are a direct factory replacement headlight system and will fit most of the ATV’s and UTV’s available today. Each PIAA H.I.D. Conversion Kit comes complete with bulb(s), ultra-thin ballast, igniters, relay harness, hardware, harness ties and installation manual.