Be careful with these in stock plastic headlight housings. The plastic used in the housing assembly may not handle the increased heat output from the bulbs. Housings can and do melt. Use them in glass lamp assemblies like the Hella.
Legal limit is 2 55w headlights and 2 55w fog lights. Those won't be a good idea. If you need extra lighting throw some 130w KC'S on there and only run them when no one is around or off road. That way you don't have low beams that blind ppl(think creating hills)