Not in my boat. Just two hoses plumbed straight to the engine. I bought a 4' section of hose to bypass the heater core for if I ever need to bypass it.
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Without the shutoffs and the hoses connected together at the heater end, you will need to winterize that hose section as if the heater was operational. That is why I would recommend capping at the engine.
No shut offs on my 2009 supra.....have thinking of doing this for safety