[vtl]

With the front control arms, have you done any investigation on how the longer M3 control arm affects the geometry vs stock? A longer lower arm must move the front wheels slightly more forward and increase caster, and also redefine the virtual pivot point location.

I believe the pickup points on the M3 knuckle are slightly different for the control arms, they are definitely different for the steering rack pickup points - the M3 tie rods on an M3 rack are around 15mm too long if you fit it on a non M knuckle, so the pickup points must be different. This might be interesting since the long proven mod for us non M guys is to fit the control arms from an M3, but does it actually have negative effects with the geometry?