These are a set of JE 1.8t 20v pistons, for all 1.8t 20v. These are a great upgrade for someone looking to build a stout, reliable engine. They have 20mm wrist pins so they will require a set of rods with 20mm pins to match. They feature JE's 2618 alloy which is stronger then most other pistons made from 4032, and are specifically engineered for extreme applications. Dish requires no deburring or preparation.