PPE Ported Cast Iron Cylinder Head Set For 2004.5-2010 GMC Chevy 6.6L Duramax 1993-2008 Toyota Corolla and manufactured right here in

and manufactured right here in the USA

7% over stock intake system

1999-2006 GM Silverado/Sierra 1500 6

65-RFE and 66-RFE Transmission

Muffler Included: No (Muffler Delete)

PPE Ported Cast Iron Cylinder Head Set For 2004.5-2010 GMC Chevy 6.6L Duramax 1993-2008 Toyota Corolla and manufactured right here inThe 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, 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. PPEs new ported Cast Iron Cylinder Head is the ultimate upgrade to your