Athena Cut Ring Racing Head Gasket for Subaru Forester SG Impreza GG GR GH G3 GD 2.5 EJ25 EJ255 EJ257

The Athena Cut Ring Racing Head Gasket is engineered for high-performance and motorsport applications, delivering outstanding combustion sealing and durability under extreme thermal and mechanical stress typical of motorsports and drag racing. With a thickness of 1.20 mm and a bore diameter of 101.30 mm, this gasket is designed for high-pressure Subaru EJ25 engines, including turbocharged and NOS applications where boost exceeds 2 bar.

Key Features

Stainless Steel Cut Rings (AISI 304): Separate support rings provide maximum sealing capacity around the cylinder bores, ensuring no loss of compression even in extreme turbocharged or NOS applications.

Cut Ring Technology: Combines excellent high-pressure sealing with recessed copper-style rings, eliminating the need for irreversible engine block modifications.

Reinforced Motorgasket Core: Constructed with a steel core covered by two layers of asbestos-free aramid fibre, developed by Athena’s R&D department to provide exceptional thermal and mechanical resistance while maintaining optimal adaptability to cylinder head and block surfaces.

Silicone Beading: Applied to critical sealing zones such as oil and coolant passages to ensure maximum sealing reliability under all operating conditions.

Motorsport-Oriented Design: Engineered to withstand the extreme loads and stresses associated with motorsport and drag racing environments.

Installation Notes

Designed for high-pressure applications without the need for engine block machining.

Maintains sealing integrity under extreme thermal and mechanical stress.

Each gasket reflects Athena’s continuous research and development focused on performance, reliability, and durability.

Specifications

Brand: Subaru
Engine Family: EJ25
Bore Diameter: Ø 101.30 mm
Thickness: 1.20 mm
Material: Motorgasket composite with AISI 304 stainless steel Cut Rings
Recommended For: Motorsport / Drag Racing / Turbocharged / High Boost / NOS Applications
Set Includes: 1 Gasket

Compatibility

Subaru EJ25 / EJ255 / EJ257 engines

Subaru Forester (SG) 2.5 AWD
Subaru Impreza WRX / WRX STi 2.5 AWD (Sedan / Hatchback / Wagon)