Greddy Metal Head Gasket Toyota (2JZ-GTE) - P/N: 13511320 Product Model: GRD-13511320 Description: 1.2mm thick / 88mm bore Notes: JZA80 Metal Head Gaskets With higher boost pressure comes increased horsepower, this means increased cylinder pressure. These special metal reinforced Head Gaskets are available in various thickness to lower compression levels and help withstand the extreme temperature and cylinder pressure of an ultra high output engine.