Universal T4 Turbo Heat Blanket (WCF100731)Description Fits: T4 S300 and S400 turbo housings If you want to keep the stock turbo under the hood of your truck why not extend its lifespan and lower the underhood temperatures to make sure the rest of your truck is working correctly! Part Number: WCF100731 Features Easy to install blanket keeps heat inside the turbo housing Decreases underhood temperatures Internally rated to over 2500F direct heat Durable high temperature exterior shell material