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mandrel bent 304 stainless steel tubing
reduces wear
Beware of inferior bleeder screws without an air channel
Excess oil on the crankshaft can cut horsepower
2001-2004 GM 6.6L Duramax CNC Ported Cast Iron Cylinder Head (One Head) LB7 2017-2019-ford-f-250-super-duty-8-cyl-6-2-liter-esi6121947 mandrel bent 304 stainless steelDuramax Ported Cast Iron Cylinder Head 2001 2004 GM 6. 6L (One Head) LB7 The OEM Duramax cast aluminum cylinder heads fall short over time the differing heat expansion rates between the cast iron engine block and cast aluminum cylinder head cause head gasket scrubbing and eventually blown head gaskets. The aluminum cylinder heads are also prone to warping, melting, and or cracking in high performance applications where excessive heat is introduced.
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