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This head gasket from Alliant is a direct replacement for your 2001-2010 Duramax
2 sets of springs required
2001-2005 Duramax LB7/LLY Mahle Set of 4 Pistons w/ Rings Right Bank -
2010 Duramax Left & Right Bank Manifold Set (115051500)
2001-2025 Duramax 6.6L Callies Stage 1 Alternate Firing Order Induction Hardened 108 LSA + 4° Advance Camshaft (270-009) 2010 - 2012 Dodge Exhaust Systems This head gasket from Alliant2001 2025 Duramax 6. 6L Callies Stage 1 Alternate Firing Order Induction Hardened (270 009) The main reason for modifying the Duramax firing order with the camshaft is to relieve stress on the front portion of the crankshaft in higher performance applications. The OEM firing order ends at Cylinder #3 and then continues from the beginning through cylinders 1 and 2. The Duramax Cranks see the most strain and tend to break right behind the first rod