I have seen at the factory a 128 inch3 engine waiting fitment in a new M3W, presumably to special order as it doesn't seem to be a listed option. Never seen anyone on here admit to owning one though wink

Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone