Que the big debate....
Been lots of discussion about this on the forum previously. The key point was: the standard air box is about as good as they come.
Fit a kit and you'll get a mighty roar, but without closed/ram air feed, you're likely to loose power.
Simota do a carbon shielded intake for c.£800.
Or there's a cheaper one for c.£450. Can't remember the brand name
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