Osram NB is 12 V 60/55 W H4 bulb and costs Rs. 700/- per piece here. It is a direct fit which needs no modifications.
When you replace the bulb, remember to replace all the 4 visor nuts and tighten properly. Otherwise, the bike may vibrate due to the loss of its alignment.

(The bulb is Philips 35-35 W, not Osram NB)


.I sincerely dont recommend any one shifting to 55w on stock bike as you will get much less light than the stock bulb may be 50% less than stock bulb
and absolute waste of nearly 1000 rs.i recommended hid as option of headlight improvement with approx 1000 more that's it and you wont regret it.
.Its not worth installing a 55w bulb on gs.I have tried and tested,Light from bulb is very low even compared to stock one.You can also try testing with any normal bulb(55w) once prior going to xtreme or night breaker.Just ask any guy who has car he will surely have a spare or just buy a normal one worth 50-70 rs get it installed for 20 rs and test(i will bet you will save 600 rs for not buying the NB).This is how you can decide whether to go for Night breaker or not.Surely HID is a best option for GS for lightning upgrade

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