{"id":9970270830832,"title":"2011-2016 Gm 6.6L Duramax Cast Iron Cylinder Head Pair LML","handle":"2011-2016-gm-6-6l-duramax-cast-iron-cylinder-head-one-lml","description":"The OEM Duramax cast-aluminum cylinder heads fall short over time - the different heat expansion rates between 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\n melting and\/or cracking in high-performance applications where excessive heat is introduced.","published_at":"2026-04-04T12:14:36-07:00","created_at":"2026-04-04T12:14:35-07:00","vendor":"PPE Pacific Performance Engineering","type":"Cylinder Head","tags":["Cylinder Head","GM"],"price":259595,"price_min":259595,"price_max":259595,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":49500191457520,"title":"Default","option1":"Default","option2":null,"option3":null,"sku":"duramax-cast-iron-cylinder-head-one-lml-2011-2016-gm-6-6l","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"2011-2016 Gm 6.6L Duramax Cast Iron Cylinder Head Pair LML","public_title":null,"options":["Default"],"price":259595,"weight":0,"compare_at_price":null,"inventory_quantity":4,"inventory_management":"shopify","inventory_policy":"deny","barcode":null,"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}],"images":[],"featured_image":null,"options":["Title"],"requires_selling_plan":false,"selling_plan_groups":[],"content":"The OEM Duramax cast-aluminum cylinder heads fall short over time - the different heat expansion rates between 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\n melting and\/or cracking in high-performance applications where excessive heat is introduced."}