[rdass623]

the car bypass pipes are just fine unwrapped. the removal alone of the secondary cats will lead to cooler trunk temps (as mentioned above). additionally you would need to dismember a body to fit it into the rear trunk, so they will not be complaining about the temperature. the only real "advantage" I can see out of wrapping the cat delete pipes is the addition of a substance which will hold road salt and moisture against the pipes, enhancing the corrosive properties of both.