Effective heat protection for turbocharger turbine housings BOOST products Heat Protection - Turbo Heat Shield - T4 - Black Black Turbo Heat Shield or turbo nappy for exhaust housing T4 and similar Effective heat protection for turbocharger exhaust housings So called turbo nappies are preformed shields which are simply put on a turbocharger exhaust housing so the emerging temperatures can be kept inside the exhaust housing and don/t burden the rest of the components in the engine bay. Additionally the kinetic energy can be used to improve the turbochargers response time and to increase the turbochargers performance. Materials: Fiberglass, Silicate, Aluminum For exhaust housings: T4, GT40, GT42 and similar Temperature resistance: up to 1100°C Color: black