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Wrapping your exhaust headers to the snail is more about making the most power possible, it helps ensure that there is more energy in the exhaust stream to spin up the turbo, none of it lost into the engine bay.
You would of course want to wrap it when you've added a grille block.
Another mod would be to add smoothie wheel discs and/or wheel skirts on the rears. Cover those big air churns up and stop wasting energy spinning air needlessly.
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Lead or follow. Either is fine.
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