The McCormick 3695317M91 is a genuine OEM cylinder head gasket designed for Perkins 1004 series engines, including 1004.4, 1004.40, 1004.4T, 1004.40T, and 1004.40TA variants. This critical engine component provides a secure and leak-free seal between the cylinder head and engine block, essential for maintaining optimal engine compression and preventing fluid leaks. Manufactured to precise specifications for durability and performance in a wide range of agricultural and industrial machinery, including McCormick, Massey Ferguson, and Landini tractors.