I decided to write this as a seperate post, because it may help someone with similar dilema. I kept my stock sportline springs even though I thought about going for eibach pro kit. I even tried to order them, but my car is superb 3 190tdi 4x4 liftback and the sales guy insisted I should go for the superb 3 combi/ vw touaran spring set ( part no. E10-79-012-04-22 ), even though what I found I should buy is set for superb 3 liftback (part no. E10-85-042-03-22 ). These two kits have the same front springs, but different rear. I listened to my gut and decided to stick with oem height as lowering wasn’t something I wanted, i just thought to give them a try when the whole suspension is already being done, having in mind they aren’t too expensive and may improve handling. What made me get cold feet was I have read about “nose heavy” look that many guys got after instaling the eibach and I really don’t like it. So i did some digging and found out : Stock sportline springs for my car are: Front: 281 mm lenght, 12.5mm wire, 140mm diameter, 4.6 coils Rear: 320mm lenght, 13mm wire, 109mm diameter, 7.8 coils Eibach pro kit: Front spring(same in both kits) F11-85-042-03-FA 248mm lenght, 12.5 wire, 136.5 diameter, 4.75 coild Rear spring in liftback kit F11-15-007-04-HA 303mm lenght, 13.5 wire, 116mm diameter, 8 coils Rear spring in estate/ touaran kit F11-79-008-01-HА 327mm lenght, 13.75 wire, 122mm diameter, 8.2 coils. I put all these in one of those spring rate calculator(i know that isn’t really scientific) but it was interesting. Sportline oem front- 39.02 NM/mm Sportline oem back- 51.74 NM/mm Eibach front- 40.4 NM/mm Eibach liftback rear- 47.89 NM/mm Eibach estate rear- 42.43 NM/mm Rake it with a grain of salt but it does look interesting.