2001-2004 GM Duramax 6.6L LB7 Heads

Along with the complete rotating assembly, your 2001-2004 GM 6.6L Duramax LB7 cylinder head plays a vital role in determining compression while working with your camshaft and valvetrain to create your engine's power and torque curve. This is especially crucial when upgrading and modifying your engine as the stock head is typically not the best choice for performance applications. We carry aftermarket cylinder heads to dramatically improve airflow in and out of the engine so your Sierra/Silverado 2500/3500 can experience improved power each time you hop on the accelerator. Get the full potential out of your motor and let your engine breathe easier with any of the premium cylinder heads we offer here at Alligator Performance! GM Duramax Fitments: 2001, 2002, 2003, 2004 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.