Do your Coolant temps and AIT's a favor

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An added benefit that is not mentioned yet is that isolating the exhaust gases to be away from coolant passages such as these you actually allow more exhaust gas energy to transfer out of the engine completely. What this means is that your turbo will then benefit and decrease the amount of temperatures your metal sees at all operating conditions. Combine this with the knowledge that the 13B is already able to transfer more energy to a turbo charger than most other engines are able to dream of, we are able to raise the bar just a little bit.

Summary: Coolant Temps go down, AIT's go down, Spool time goes down, More heat rejected through efficient means and further able to be used down the exhaust stream (another turbo if you wanted).