Top quality, made in the UK especially for Lambretta upgrades from scratch.
 
This is a specially made 8mm packer plate base gasket to suit the small block Lambretta engine casing with the correct stud spacings for the 125/150/175/185cc etc casing.
These have been checked to make sure they are correct.  Big surface area around ports for porting.  Essential you get the correct base and head gaskets fpr setting correct port timings and squish height.
 
Ideal for use with larger con-rod conversions.