ATHENA (MLS) Multi Layer Gasket

Material

ATHENA MLS gaskets consist of 3 to 5 layers made from various raw materials. The combination of outer and inner layers is engineered to withstand higher compression levels than standard configurations, with the type of steel varying based on engine requirements. These gaskets ensure an even torque load across the sealing surface, compensating for any bore distortion. They are suitable for both aluminum heads to cast iron blocks and aluminum heads to aluminum blocks.

Manufacturing Process

Athena MLS Head Gaskets are crafted from high-grade 301 stainless steel, fully hardened. Each layer is precisely formed using advanced laser cutting technology and is embossed through an optimized formation process. Two of the head gasket layers undergo a stress-relieving process to minimize stress induced by embossment. A proprietary two-part polymer coating is applied post-stress relief, ensuring uniform coverage of the outer layers and preventing any breaks in the coating, which guarantees a micro seal for engine coolant and oil fluids. These gaskets are rigorously tested on engine dynos and for endurance performance.

Gas Stopper Technology

The gas stopper technology is a critical design feature of racing MLS head gaskets. The stainless-steel stopper layer incorporates an advanced “active fold” that provides a high-pressure seal around the cylinder bore when the cylinder head is tightened. This gas stopper is positioned around the combustion chamber, allowing for tighter clamping of the cylinder head and engine block, thus preventing gas leakage from the combustion chamber and reducing component distortion through quicker temperature equalization.

Benefits

• Superior sealing properties under high pressure conditions
• Higher elasticity and constant load resistance
• Optimized load balance
• Improved engine performance
• Longer durability

Proprietary Coating Technology

The two-part polymer coating is applied after the stress-relieving process, ensuring uniform coverage of the outer layers without breaks in the coating. This process provides a micro seal for engine coolant and oil fluids, meeting the demands of various harsh environments. The first layer is a high-temperature compound that conforms to fill surface irregularities of the engine block deck and cylinder head. Athena’s gaskets can seal surface finishes up to 60 Ra, while typical MLS head gaskets require a surface finish of 30 Ra. The second layer releases easily and does not adhere to mating surfaces during engine disassembly.

Fits:

SUBARU EJ20 (Turbo) 1994cc 155kw
SUBARU EJ201 1994cc 85kw
SUBARU EJ202 1994cc 90kw
SUBARU EJ204 1994cc 103kw
SUBARU EJ205 1994cc 125kw
SUBARU EJ205P 1994cc 206kw
SUBARU EJ207 1994cc 195kw
SUBARU FORESTER (SF_)2.0 AWD (SF5) 1994cc 90kw
SUBARU FORESTER (SF_)2.