This is far as you can come with pistons for a vw engine.
We use this JE pistons in our R&D hi-rev motors,thye are only 380g
complete(94mm bore).
They are a two ring design ,domed,3d machined underside and twoway
gasported.The ultimate in piston design.
Kolvar
Our own JE custom made vw piston wich can be used with stroke up
to 86mm, 5,7" rod and still using std cylinder .
This means shorter pushrods and shorter cylstuds wich is one step up in
performance.
94mm piston with rings ,pin and locks is only 420g.