No, heatercores don't come with barbs. Will they leak when you use hoseclamps on hoses slipped over the heatercore? well, they don't leak that way in car setups with higher pressures and flow rates, do they? If you wanted barbs on there, soldering them is about all you'll be able to do unless it's a copper heatercore. If you have a copper heatercore and brass fittings you may be able to braze it. Personally, I recommend you go with the hoseclamp setup. good luck
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