The Cometic Subaru FA20 89.5mm .052inch RHS MLX Left Side Head Gasket - C4589-052 is a precision-engineered head gasket with a 89.5mm bore and .052" compressed thickness for the Right-Hand Side (RHS).
The Cometic MLX Multi-Layer Steel (MLS) head gasket is engineered for high-performance and racing applications where OEM gaskets fall short. Featuring MLX Multi-Layer Steel (MLS) construction, this gasket uses multiple embossed steel layers for superior sealing under extreme cylinder pressures and temperatures. Precision CNC-machined to exacting tolerances, this gasket seals combustion, water jackets, and oil passages simultaneously — eliminating the need for multiple gaskets or sealing compounds.
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Material: MLX Multi-Layer Steel (MLS)
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Bore Size: 89.5mm
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Thickness: .052" compressed
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Position: Right-Hand Side (RHS)
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Part Number: C4589-052
Verified fitment: Scion FR S (2013–2016); Subaru BRZ (2013–2020); Toyota 86 (2017–2020).