This is a specially made Lambretta base gasket with the correct stud spacings for the 125/150/175 block lambretta engine casing. These have been checked to make sure they are correct. Big surface area for porting. It is essential you get the correct base and head gaskets for setting correct port timings and squish height.
Available in 0.5mm, 1.0mm and 1.5mm
These are available in 2.5mm and 3.0mm here: http://www.lambrettaupgrades.co.uk/apps/ webstore/products/show/7680638
Price includes VAT @ 20%