My experience is that anywhere the cooler lines touch the body, it will amplify the whine. I was able to pad mine in several areas and make the noise better. I can hear it 'cause I know it is there. I have never had a passenger point it out to me.
If you are getting under the car...try to pad wherever there is a touch point.
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Stillen | EVO-R | HPS | K&N | Hotchkis | Modshack Oil Cooler | SPL
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