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Old 23-03-2017
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Nanook  Nanook is offline
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They all whistle because of the air flowing over the cooling fins on the rear of the light.

Go to Clark Rubber and get yourself either some U-seal or pinch weld.

Buy enough to cover two rows of fins. Place one lot on the bottom fin and another 2 - 3 fins above that.

After this you may get some noise if it's a windy day and coming from side on but apart from that this will stop the noise.
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MY15 WK2 GC Limited 3.0L. Ironman lift, bullbar & winch. Uneek rack & sliders