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0504htp Lt1 09 Z

A carbide ball is used to size the valve guides, which require two thousandths of clearance on the exhaust size to account for heat expansion and only one thousandth on the intake.
Crate LT1 Engine - Displacement On Demand

 A carbide ball is used to size the valve guides, which require two thousandths of clearance on the exhaust size to account for heat expansion and only one thousandth on the intake.  View Related Article

 

 

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