Designed for non O-ringed cylinder jug fits 93mm bore, .035” Thickness - four layer gaskets combine advanced materials with state-of-the-art manufacturing processes to provide custom-tailored solutions to meet the needs of each individual application. This head gasket is comprised of a four layer setup - Viton coated embossed spring steel outer layers surround a steel inner layer that provides support and thickness to the gasket. Embossments on the gasket allow for a proper seal around oil and water passages. Fits all XPTurbo, Turbo S, Pro XP, Turbo R and Pro S models.