The PIAA xtreme whites have a blue coated tip on the bulbs. this gives the bulbs a much more blue color than the superwhites. honestly i dont think they are much brighter than the superwhites, they just have more blue tint if thats what youre looking for. they are also DOT approved which is nice.
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2000 XE 4x4, ARB bumper, 33x10.5 KM2, 3" fabtech SL, Skid Row skidplates, Calmini Sliders.