[1fastredsc]

Anything from MM should be avoided dude. Those are byrol cylinders, which as i understand it were used in the very early motors before porsche went to aluminum cylinders with ausil and nikasil coatings.
Plus they don't list machined work in order to except the 101mm bore (however extensive that may be).
Why not get those new cylinders that pelican carry (can't think of the name off the top of my head)? They seem to have a strong backing and are a little less than mahle cylinders. Couple that with a set of custom JE pistons and you've saved some money over mahle stuff.