PPE Upgraded Cast Iron Ported Cylinder Head Set For 01-04 GMC Chevy 6.6L Duramax Fuse Box Cover The crisp white output closely

The crisp white output closely matches most factory LED headlights and provides excellent visibility for nighttime driving

HYBRID SPEC: Using a combination of both LED & Incandescent bulbs (thus

5" per axle channel frame and 12-bolt rear

CNC-bent from DOM tubing for proper tire

PPE Upgraded Cast Iron Ported Cylinder Head Set For 01-04 GMC Chevy 6.6L Duramax Fuse Box Cover The crisp white output closelyThe 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