Subaru 2.5L EJ25 (14mm Studs) Athena Racing Head Gasket Cooper Ring

ATHENA Cooper Ring Gasket

Features

• For specific high-horsepower applications, engine performance can be significantly improved by using Athena Cooper Ring gaskets supplied with stainless steel rings.
• This technology outperforms conventional fire-ring solutions. Reinforced material M0115 (see features below): asbestos-free composite raw material, OE-approved.

Properties

• Motorgasket M0115 withstands mechanical and thermal stress well and conforms well to sealing surfaces. Motorgasket M0115 is resistant to oils, fuels, mixtures of water and antifreeze, and corrosion inhibitors.
• Stainless steel ring (AISI 304): separate stainless steel rings ensure maximum sealing around the cylinder bore, including in NOS and/or turbocharged engines where boost exceeds 2 bar.
• No head or block machining required.
• Silicone beading: Silicone-based beading is applied to critical areas to improve sealing around all coolant and oil passages.

Surfaces

• Color: Gray
• Treatment: Special coatings are applied for high-stress applications, such as a PTFE anti-stick coating or a special silicone coating that improves micro-sealing and silicone beading.

Cooper Ring Gasket General Installation Notes

• Be sure the ring engravings face the engine head.

Cooper Ring Gasket Manufacturing Process

1. Pressing Process: Each gasket is pressed to achieve perfect flatness within the required tolerances.
2. Silicone Beading: This process adds a silicone bead to specific areas of the gasket to improve sealing around liquid passages (water and oil).
3. Finishing: Applying different surface coatings improves gasket performance, prevents sticking, and enhances high-temperature resistance.
4. Cooper Ring Assembly: Each gasket supplied with a steel ring is manually finished to ensure perfect Cooper Ring installation.

Athena Gasket: High-Performance Cooper Ring Insert

For specific very high-horsepower applications, the performance of a conventional or MLS head gasket can be significantly improved by using a different sealing system for the combustion area.
Athena uses a proprietary INOX steel fire ring that offers improved sealing technology compared with copper and conventional fire rings.
This solution dramatically increases the cylinder head gasket's resistance to extreme