PTP 000507 T3 T4 Lava Turbo Blanket / Turbo Shield / Heat Shield PTP Turbo Blankets isolate the heat produced by your turbocharger with the purpose of reducing turbo lag, cooler air intake temperatures, protecting and prolonging engine components, and giving a boost in horsepower. Made with the same materials that are used in Military and Aerospace applications. 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 calcium magnesium silicate wool, overlaid with a high temperature silica fabric for increased durability and for improved thermal resistance. Inside Continous Use Temperatures: 1832F / Outside Continuous Use Temperatures: 1800F Proudly made in North America with a 1 year warranty.