Hello,

If i have a standard dual relief case that is currently with 85.5 pistons what size pistons and barrels can i go up to without any machining

Bolt on only.

Thanks heaps

These will slide straight in, no machining anywhere........
http://aapistons.com/collections/vw-piston-liner-kits/products/87x69mm-1641cc 

These will slide into the case but need machining on the heads only.........
http://aapistons.com/collections/vw-piston-liner-kits/products/88x69mm-1700cc...