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nite-stalker said:
anyone know the ID of the heater hoses on a b13?
are both in/out lines the same size?
Don't quote me, but yes they are the same size (hose diameter-wise). I bought 5/8" plugs when I removed my heater core, hoses, etc..
 

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IIRC, one of them tapers a bit. Maybe someone can clarify on this a bit more...Josh
 
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