We’ve done extensive testing on the front and rear converters with and without the Cat Shield under numerous driving conditions. Our data reveals that during city or freeway driving, there is minimum temperature increases (10 degrees max) and there is actually lower temperatures with the Cat Shield at the rear position when driving on the freeway. This is likely due to the Cat Shield making the vehicle more aerodynamic, which reduces turbulence, and makes the louvers more effective at drawing out heat.
Even right after spirited driving and when the car is turned off, the Cat Shield will be safe to touch (although we recommend using proper safety equipment like gloves at all times). Temperatures at different points of the shield on average were 80 degrees. We also measured temperatures on the underbody of the car near the hottest points (front and rear converters) and saw consistent and similar temperatures of 80-200 degrees.
Based on the temperature data, we conclude that the shield will have no impact on increased cabin temperature, will not pose increased danger to flammable material underneath the car (in fact, the shield protects material from touching the hottest part of the exhaust, the converter/s.), or prematurely wear down exhaust components.