Cometic .036" MLS Head Gasket - 83mm Bore | Toyota 4A-GE/4A-GEC/4A-GELC 16V (C4166-036)4A GE 4A GEC 4A GELC (16 Valve) MLS Head Gasket by Cometic COMETIC MLS (Multi Layer Steel) Head Gaskets provide maximum sealing performance for today's 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