Piaa H4 Super Plasma GTX 60/55=110/100W Single Bulb #70436. Discontinued item, limited to stock on hand.

PIAA GT-X replacement bulbs are designed with an exclusive purple low beam and an Xtreme White high beam. A purple topcoat gives the headlight a bluish-purple look even when the light is turned off. GT-X bulbs feature PIAA’s Xtra high efficiency technology that produces greater light output than the bulb’s rated power consumption.