With my VVC mapped my throttle bodies make a lot of noise. So much so that I got kicked off Castle Combe for a 105Db drive past.

So project airbox has been brough forward

With an old Pipercross 600 baseplate and an airbox filter off Ebay, I've knocked up this.

Much quieter now at idle, weather been a bit nasty for a road test yet.
ATB Dan.


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Basic parts


Basic parts 2


Longer trumpets


Filter fitted


A little tiding to do.


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fantastic result! would be great to here the decibel comparison...