+3 Cylinder Head Gasket Set Grade C Set for 6.6l Duramax 2017-2020 L5P 12676859 KB-12676859 $133.95 In stock Quantity: 1 Add to Bag Product Details Cross Reference:: 12636480, 12676859 Genuine Cylinder Head Gaskets for 2017-2020 6.6l Duramax L5P engines. Cross Reference: 12636480, 12676859 This listing is for a pair of head gaskets (Grade C). New head bolts are required when head is removed to replace gaskets. Save this product for later Favorite