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					Originally Posted by  JDMsurprise
					 
				 
				Okay, so are you saying no seal on the outside is okay? As far as I can see, the retrofit kits I am familiar with are fully sealed like the OE bearing. 
 
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Quality units, like the LN retrofits, the outside is not a full seal, it is designed to let the engine oil mists lubricate the bearing, while blocking any debris from entering the bearing.