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You can aid engine cooling by quite simply drilling out the side vents on the roadster, the nearside vent is half opened from the factory as the induction pipe and air temperature sensor sits right behind it.

The offside however is totally shut off, so why not drill them out to make use of something that is already there?

This can easily be done in place in a matter of minutes, however if you wanted to make them look really professional you could dremel them from behind to reveal the full diamond shape for that factory look.

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