Cometic MLS Head Gasket - Honda Civic D15Z1 D16Y5 D16Y7 D16Y8 D16Z6 - 76mm Bore .040" Thick - C4195-040Cometic MLS (Multi Layer Steel) Head Gaskets provide maximum sealing performance for todays high output engines and require no sealants. MLS gaskets are ideal for both aluminum heads to aluminum blocks and aluminum heads to cast iron blocks. They can withstand the shearing force created by the two materials. MLS gaskets have increased strength because they are comprised of multiple layers of stainless steel; which also creates the ability to rebound