2006-2007 GM 2500HD/3500HD 6.6L LBZ Duramax Heads & Valve Train

The OEM cylinder heads on your 2006-2007 GM 6.6L Duramax LML are key to managing compression and shaping your engine's power and torque. When it's time to replace such a critical component, choose a premium upgrade you can rely on. At Alligator Performance, we partner with the most trusted brands in the industry to bring you the highest-quality parts for your rig. Unlock the full potential of your GM 2500HD/3500HD by investing in one of our top-tier cylinder heads today! Check out our full selection of Engine Upgrades for additional performance! GM Duramax Fitments: 2006, 2007 GM 6.6L Duramax. Submodel Fitments: WT, Custom, LT, LTZ, High Country, 1LT, 2LT, Pro, SLE, SLT, AT4, Denali. Some exceptions apply, please see individual product pages for specific fitments.