Fuel pump!
What pump do you have?
I have a Bosch 044 in tank and on hot days with less than a 1/4 tank of juice it sounds like that - but isn't as loud as yours.
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[CENTER][COLOR=#ff0000]Built Ej207: Semi-closed RA Cases - Wiseco Forgies - Manley rods - BC 272 cams - GDA Heads - billet f/whl - Vi-pec - WbO2 - 800cc Yellow tops - TD05-20G - 409Hp ath @ 1.75bar on E85[/COLOR][/CENTER]
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