Thermo-Tec Turbo Heat Shield Kits were designed to protect, improve turbo performance, and eliminate turbo lag of your turbo charger. This Turbo insulating cover, to contain the heat produced by a turbo, fits a wide variety of turbo chargers commonly used in automotive applications. These custom cut-to-fit kits come with an excessive amount of material to cover turbos from the smallest automotive application to heavy-duty truck applications. Thermo-Tec Turbo Heat Shield covers are available for four, six, and eight cylinder applications, from the little baby turbo all the way up to T4 sizes..