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Old 05-08-2016, 12:07 AM   #15
vettedad61
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Join Date: Nov 2010
Location: USA
Posts: 68
Re: How can I tell the differense between 5.3 and a 4.8 liter LS motors

There is a tab on the head gasket between the engine block and head, the tab is behind the exhaust manifold on both side of the engine... The tab on the head gasket is stamped 4.8 or 5.3.
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