Head gasket how dripping coolant! Which HG to use?

Hi all,

Well after about 4 mths of topping my coolant up due to the head gasket leaking coolant down the front of the block (only with a hot engine), today its now leaking all the time -











The engine has no oil/coolant mix and has not overheated and is still being used for short trips.

My question is what heat gasket do I replace this with?



Thanks.

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