Supertech supplies this four‑piston set for VW 1.8T applications with an 81.5mm bore and a -4cc dish yielding a 9.3:1 compression ratio. Rings are not included; the description rates the pistons for up to 600HP at 33 PSI. Use this set when replacing or building 1.8T engines sized to the listed bore and dish volume.
Supertech VW 1.8T 81.5mm Bore -4cc Dish 9.3:1 CR Pistons - Set of 4 (Rated 600HP/33PSI) (Excl Rings)