AFAIK the system is there to HEAT UP the intake in very cold climates, so not an issue at all in most of Australia. The only potential down side would be that however small, the throttle body is acting as a heat sync and cooling the system.
I have often thought about removing it, but just never bothered since doing nothing is easier
What I WOULD like to do is get an oil cooler which would be of much benefit to the hot running VR6 engine.
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