Athena Cylinder Head Gasket MLS Kit Porsche 911 (997 / 991)

Multi-Layer Head Gasket (right + left cylinder bank), Bore 103mm, Thickness 1,00mm

Metal head gaskets for Turbo conversion and performance upgrade

Make: Porsche
Model: 911 (997 / 991) 3.8 & 4.0L

Capacity:
3800ccm
3996ccm

Fits for engine codes:

• MA1 . 70
• MA1 . 71
• MA1 . 75
• MA1 . 76
• MA1 . 77
• MDA . BA
• MDB . CA
• MDG . GA
• MDG . GB
• MDH . NA

*Please note this application list is only listing the most popular models. For a full list of applications covered by gaskets, please check engine number.

Models and years:

• 911 997 TURBO 3.8L, 2010 - 2013
• 911 997 TURBO S 3.8L, 2011 - 2013
• 911 991 TURBO 3.8L, 2014 - 2016
• 911 991 GT3 3.8L, 2014 - 2017
• 911 991 GT3 RS 3.8L, 2015 - 2017
• 911 991.2 TURBO 3.8L, 2017 - 2018
• 911 991.2 TURBO S 3.8L, 2017 - 2018
• 911 991 GT3 3.8L, 2018 - 2019
• 911 991.2 GT2 RS 3.8L, 2018 - 2019

Thickness: 1,00mm
Bore: 103mm

Athena presents the new Cut Ring gaskets for Porsche 911 6-cylinder engines. Cut Ring gaskets are the most suitable for turbo engines, which run at pressures exceeding 2 bar, and therefore require high mechanical and thermal resistance. Athena’s R&D department has engineered these gaskets to ensure maximum sealing even at high pressures and temperatures. The OE gaskets, multilayer steel MLS, have been replaced by a composite material consisting of a two layers aramid fiber material, reinforced by a central stainless steel layer. Stainless steel rings, machined from solid, are positioned around the cylinder bore openings of the gaskets, instead of the classic fire rings. The gasket material developed by Athena perfectly resists the stresses of high compression engines and it is treated with special anti-stick and anti-tear coatings. During installation, no modification of the head or engine block is necessary.

Cut Ring

To ensure exceptional sealing, greater than the one given by conventional fire rings, the gasket comes with stainless steel rings around each cylinder bore. These rings ensure excellent mechanical strength, heat dispersion capacity and tightness in the combustion chamber. Cut Rings are manufactured by machining centers with extremely tight tolerances. Their special cusp shape allows the gasket to fix on the cylinder head and to remain always in position, thus ensuring maximum tightness. Athena Gaskets are the best solution for all iron and aluminum engine blocks or cylinder heads.

Silicone Beading

During the modelling phase, Athena R&D technicians study and define the critical areas of the gasket where it is necessary to improve the seal around the oil and coolant passages. A silicone beading is thus applied with high-precision screen printing machines. An optimal sealing guarantees maximum running efficiency and avoids engine damages or decreased performance.

Surface Coating

The gasket is subsequently subjected to a silicone-based surface treatment to prevent any sticking to the cylinder head or the engine block, which would cause the gasket to tear and deteriorate over time, thus losing its sealing capacity.

Motor Gasket Sealing Material

Developed by Athena’s research laboratories, Motor Gasket sealing material is conceived and produced to guarantee the quality, the efficiency and the reliability for which Athena stands out. Available in various thicknesses and configurations, it guarantees high mechanical and thermal resistance and it adapts optimally to sealing surfaces. They are also anticorrosion and resistant to oil, fuel and to mixtures of water and antifreeze.