Phil these bulbs are excellent, still road legal, still yellow colour so match the DRL's but they are very bright , so a great upgrade!
and yeah straight swap
When you say yellow, do you mean the same yellow as the DRLs? I've seen that the DRLs look slightly yellow when compared to HIDs but I'd be happy with that colour if they match, considering the standard bulbs look very yellow compared to the DRLs.
And how easy are they to fit, do you have to take out the whole headlight? I think the driver's side one might have enough of a gap to swap it without taking the whole unit out.
Edit: on ebay it says these bulbs are "up to 4000K", does anyone know what colour temp the DRLs are meant to be?