PPE Upgraded Cast Iron Ported Cylinder Head For 01-04 GMC Chevrolet 6.6L Duramax 1989-1993 5.9l 12v cummins 5" bolt pattern is common

5" bolt pattern is common on many vehicles such as the 6 lug Toyota 4-Runner

or the original equipment tail pipes

(1) Front BP-51 Coilover (driver side)

Tooth Quantity:  106

Free shipping on domestic orders will be included with your PCM Cross Ship

PPE Upgraded Cast Iron Ported Cylinder Head For 01-04 GMC Chevrolet 6.6L Duramax 1989-1993 5.9l 12v cummins 5" bolt pattern is commonThe 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. PPEs new ported LB7 Cast Iron Cylinder Head is the ultimate upgrade for