For GT25, GT28, GT30, GT32, GT35, GT37 and other turbo's with a T3 exhaust housing. for GT2871, GT2860, GT3582, GT3076, GT3037, T70, T04E T3 Turbo. Material: Basalt fiber/Titanium Fiber. Our high-quality basalt fiber can withstand high temperatures up to 800°C.