Lava Turbo Blanket Materials:With an outer layer made from actual pulverized volcanic lava rock (continuous-filament basalt) formed into fabric and woven into a tight mesh weave, these turbo blankets are internally insulated with high temperature stainless steel foil, overlaid with a high temperature wire mesh for increased durability and for improved thermal resistance. The Lava Turbo Blankets are designed to withstand the harshest of conditions.Lava Turbo Blanket Heat Tolerance:Interior Surface:Max Temperature Rating: 2300 Deg F/ 1260 Deg CContinuous Use Limit: 1800 Deg F/ 982 Deg CExterior Surface:Direct Contact Limit: 1800 Deg F/ 982 Deg CRadiant Heat Limit: 2500 Deg F/ 1371 Deg CMade to fit stock Porsche 997 VTG Twin Turbos