Note, there is only TWO Koni FSD kits for the entire range of 156/147/GT, fitted with any engine.
On both of these kits, the front dampers are identical (both with "2100" as the part number), only the rear dampers are different. What difference there is in the rear dampers, I don't know. I have 2100-4027 installed on my 156 V6 and I have driven a 156 V6 fitted with 2100-4801, both cars with Eibach Pro springs and both on 225/45/17 tyres. No difference in ride height with them or how they feel on the road. I would just buy whichever kit is cheapest.
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