Due to the close proximity between the two halves of the turbo, it is extremely common for heat sink to occur. This can decrease performance output while increasing the work of the input components during the combustion cycle. Funk Motorsport T2 Turbo jackets are designed to keep the hot side of your turbo insulated while keeping the cold side at optimum temperatures.
This helps to provide cooler airflow to the cooling system and MAF sensor, leading to an increased ignition spark and higher output of energy from combustion. By ensuring that the turbine sector of the turbo remains hot, less heat will be dissipated into the engine bay, ensuring that exhaust gases will flow with less turbulence from the exhaust.