There are several reasons why you might want to use a turbo heat shield blanket:

1. Reduce heat soak: When a turbocharger is running, it generates a lot of heat. This heat can radiate out into the engine bay and cause other components to heat up as well. By using a heat shield blanket, you can reduce the amount of heat that is radiated out, which can help to keep other components cooler and prevent heat-related damage.

2. Improve performance: When a turbocharger gets too hot, it can start to lose efficiency. By reducing the amount of heat that is radiated out, you can help to keep the turbocharger cooler and improve its performance.

3. Protect other components: Heat can be damaging to other components in the engine bay, such as wiring, hoses, and plastic parts. By using a heat shield blanket, you can help to protect these components from heat damage.

Overall, using a turbo heat shield blanket is a simple and effective way to improve the reliability and performance of a turbocharged engine.