97257826 OE Fuel Injector Rail Return Line Bolt At Head.
This bolt is at the end of the return rail under the valve covers.
For 2001, 2002, 2003, 2004 GM 6.6L Duramax LB7
This bolt is at the end of the return rail under the valve covers. It goes into the cylinder head.
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Application: 2001-2004 Duramax