I've got to replace my front arb bushes, so after looking around here it seems as though everyone recommends using power flex ones rather than he genuine vx ones (even though they do cost a fair bit more). How long do genuine ones last in comparison to these powerflex ones?

I managed to take some pictures: http://imgur.com/a/FHU3x

Can just about make out enough of the part number to work out they are the 24mm ones.

Do I however need to order the "2 piece" bushes or not. I imagine by 2 piece, they mean you can split them? In which case those are the ones I need otherwise I've got to take the entire arb off to slide a single piece down the bar?

2piece: http://www.awesomegti.com/parts/susp...ra-c-2002-2008

Single piece?: http://www.awesomegti.com/parts/susp...ra-c-2002-2008