Ищу 997.1 С2/C2S/C4S

[Schagenwagen]

Я бы в тонкости всё-таки залез еслиб делал для себя

https://www.hartech.org/cylinder-liners

Чёрным по белому написано

Like most leading engine designers/producers we discounted cast iron/steel liners many years ago which, whilst cheaper, don’t have the same expansion rates (leading to potential head gasket sealing issues & slipping/spinning), inferior heat transfer properties & poor long term wear rates, (and have replaced many previously repaired this way after further failures).