The Supertech piston set for VW 1.8T 20V offers four pistons at 82.5mm (+1.5) bore with a 29.5mm crown height and a -14.8cc dish, producing a 9.0:1 compression ratio; rings are not included. This set is intended for 1.8T rebuilds needing that oversize and reduced crown volume to achieve the listed compression and piston geometry.
Supertech VW 1.8T 20V 82.5mm (+1.5) 29.5mm CH -14.8cc Dish 9:1 CR Piston - Set of 4 (Excl Rings)