MillerCAT completed testing on the front and rear converters with and without the Cat Shield under a variety of driving conditions. The data shows that while driving in the city or on the motorway.
There are minimal temperature rises (10 degrees maximum) and actually lower temperatures with the Cat Shield in the rear position when traveling on the interstate.
Based on the temperature data, MillerCAT conclude that the shield will have no effect on increased cabin temperature, and will not pose an increased risk to flammable material beneath the car (in fact, the shield provides protection material from having to touch the hottest part of the exhaust, the transformer.), and will not prematurely wear down exhaust components.