I know when you lower you have to realign what settings do i need with this setup and does it matter that im using an 18 in rim all round..

 

Talked to SLP and they said I should align it to stock specs.. but then i told him if i got bigger wheels then he didnt know... has anyone done this setup before slp spring/shock combo and then but on 18 in wheels.. what kind of alignment specs do i put it 2..

 

I lowerd mine with Eibach sportlines and took the following measurements to the alignment shop and they aligned it accordingly. Haven't had any problems since.
1.0 degree camber; +4.0 degree caster; 0.1 degree toe-in

Hope it helps.

 

i think the sportlines lower the car almost 2 in... mine only lowers it about half an inch..... i dont know if there is a change in specs if i go from an 17 in to 18in... if there is not i'll stay with the factory specs slp told me 2.....

 

I think you should be fine with the factory specs. A change in 1" rim size shouldn't make that much difference, I don't think.