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If you think you have performance to gain (and safety for the engine) go for it. I'd personally use some of the woven heat tape (with foil covering) instead of the foil tape that's so popular, only because the foil tape is really only effective on radiant heat while the woven stuff is a good insulator.
Does your R53 have well sealed ducting to the top mount? I know that they weren't sealed amazingly well from the factory and can benefit from simple mods to seal and improve the ducting.
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