I have a 997.1 with 7mm front and 15mm rear. Has anyone gone bigger then that? They look great but after the camber the fronts need to be pushed out more, I feel. In the rear I'm thinking of going with 18mm. Not sure about the front?

 

3mm is less than 1/8". I wouldn't bother with going from 15 to 18mm.

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True. Dose anyone know how big of a spacer I can put on the front?