Toyota 1JZ / 2JZ T4 Exhaust Manifold Thermal Management - BlanketT4 Thermal Management option for either our 1JZ or 2JZ Non VVTI GTE or GE manifolds. Designed for those wanting to reduce your under bonnet temps, these are rated at 1000 degrees C when you are on boost. For those customers in colder climates they will keep your manifold nice and warm when parked up in the winter months. Some people may not decide to ceramic coat their manifold when new, so our product is great because it can be added easily without