Originally Posted by Porschefile
The Dinan fixed plates might work for my purpose, that would put me at -2.2 or so. And may be able to get away with installing them myself since they're fixed anyway.
You would still need to get the car re-aligned, as with the M3 suspension geometry, any camber change affects toe. The GC plates are twice the price of the Dinan ones, but I like the greater adjustability.