A new addition to PIAA's stable of high performance bulbs is the Super Plasma GT-X. The new GT-X provides an exclusive purple low beam and an Xtreme White high beam. And if that weren't enough! PIAA has added a purple colored top coat giving the headlamp a purple look even when the lamp is turned off.
Wattage= 60/55w = 135/125w, 3800K/5000K
Technology= Super Plasma GT-X with XTRA Technology
Please see the Sierra BMW Bulb Application List if you're unsure what bulb your machine requires.
PIAA H4 Super Plasma GTX Bulb
Produced by PIAA of Japan