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PPE Upgraded Cast Iron Cylinder Head Set For 2004.5 2010 GMC Chevy 6.6L Duramax 2018 2024 Audi S4 1975 1980 DODGE B200 FGXX 668603 1975 1980 DODGE B200 Sold as a complete set with valve springs Whether you have a damaged aluminum cylinder head or a desire for better reliability and longevity on your Duramax engine The OEM Duramax cast aluminum cylinder heads fall short over time the different heat expansion rates between cast iron engine block and cast aluminum cylinder head cause head gasket scrubbing
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