posted this in focus RS section but no replies and i suppose it same for all cars so here it is again

http://www.larkspeed.com/index.pl?p=DV30FOC&a=i

http://www.larkspeed.com/index.pl?p=FK8DV36V&a=i

http://www.larkspeed.com/index.pl?p=FK8DV26S&a=i

the 2nd link is the most exspensive one, but thought i would get opinions as ive read there are idling issues with certian kinds??

thanks in advance luke.