Comprised of multiple embossed layers of stainless steel with the outer layers utilizing a Viton rubber coating. Compressed operating thickness is 0.032". Right hand side. Subaru FA20/Toyota 4U-GSE 2.0L DOHC Boxer 4 CYL MLX Head Gasket 89.5mm Bore. Comprised of multiple embossed layers of stainless steel with the outer layers utilizing a viton rubber coating.Compressed operating thickness is .032". RHS. Each