Full Race T4 Turbo BlanketFull Race T4 Turbo Blanket Full Race T4 Turbo Blankets are the easiest and most affordable way to protect your investment and spool faster. By keeping the heat insulated inside the turbochargers hot side, turbine efficiency goes up, reducing turbo lag. Not only does the huge reduction in engine bay temperature provide protection for the surrounding components, but it also results in a cooler air intake temperature and a boost in horsepower. Full Race