it all depends exsactly what you want....
25/30mm is near perfect drop as not to hit all the tarmac humps or ground out exhausts etc
ive been hunting for last 2 months for a lowered estate suspension kit...
the bilstein B12kit is the name for a complete kit setup not type of damper fitted.. it will be either B6 or B8 shockabsorbers
Bilstein is 30mm & will work fine as they are indead the best on market but a FIXED 30mm drop all round but some people do say that the B8 shock absorbers that are in the kit are a bit hard not very comfortable.... B8 stiff, B6 softer but uprated, B4 standard omega sports MV6 dampers.... (bilstein keep this kit in stock) i can get it for £608.00gbp
the FK Auto kit is FULLY ADJUSTABLE coilovers making the car ride from 20mm minimum upto 120mm max so you can regulate ride hight front to rear if like me you like the car level..?? i can get it for £400gbp
But there is a cheeper FK Kit that only adjusts the front struts leaving rears fixed ridehight make sure you buy the full adjustable setup if going down this route....
i myself am buying the FK coilovers but the factory is out of stock parts as they make them to order i CAL'NT get mine until available end of feb/mid march
now i know its a cheep kit but the great part is!
That they use the same identical parts ordered in from a company 4times more exspensive just rebranded as a cheeper kit under a different name FK Coilovers!
so they can always sell equipment kind of coning people to buy a more exspensive kit but they are both near identical...
(Like buying a PIRELLI tyre under a SEAT brand name both the same tyre same rubber same factory but one 75% cheeper!)
But if you lower the front anymore than 30mm you will need shorted front anti rollbar links to make antiroll bar work,
I hope this helps...??
in Basic turms if you want a fixed 20/30mm kit go for the bilstein & eibach they are no1!
if you want to be able to tune adjust your ride hight go for the Fk coilovers but they do take ages to setup!!
i will post comment again when my fk coilovers turn up!!
tyre size will be fine for a 30mm drop on 225 55 16s