As said previously i belive the 1.8 block has a water jacket between cylinders, the 2.0L does not so if you too a 1.8 up to 2.0L it would break into a water jacket, you will need a 2.0L block if you want to run RS pistons, for the right price i may be presuaded to sell you my T230 2.0L block at least then its still a genuine Montune T series engine