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I looked at some flex pipe (dryer hose) that some suggest to use for OAK.. The box says not for combustion use. Well that is what I would be hooking it to right? So where do I get the right flex pipe that I can use for combustion air?
You can use the flex pipe for combustion air, which is cold supply from where ever (ambuient temp). You cant use it on the exhaust side as combustion exhaust (too hot)
You may want to consider carb preheat hose as its a little smaller and probably more the right size for your application.