S3 (8P) OEM spring rates and arb size

I just bought the Bilstein PSS10 and would like to set it up properly. Does anyone know the S3 OEM spring rates and arb size? I did a google and only managed to find the Golf R OEM arb size which is 21.7mm at the front and 21mm rear, is this the same for the S3 OEM arb?

Anyone knows the Bilstein PSS10 spring rates too?