Reduce heat in your engine bay with the BD T4 Turbo Blanket. One of the main drawbacks to a turbocharged engine is the massive amount of heat that is generated. Keep engine temps at bay and protect vital engine components with this Turbo Blanket. Cooler engine compartment temperatures can result in higher density that results in more power and by covering up the turbine housing of the turbo reduces under hood temperature increasing life of hoses, harnesses and coolant bottle. Not only does a blanket help cool the engine compartment, it helps retain and normalize internal turbine housing temperatures for lower spool times.