Airbox

I put a k&n panel filter in my fr tdi to complement my bluefin remap there is a slotted panel that sits at the bottom of the airbox i tried to remove to clean out the bottom of air box and broke one of the slots i guess its job is to stop water/spray being sucked in to the air filter has anyone removed it to aid air flow ?

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The screen shot is a golf r standard air box mod on you tube that removes the panel i broke

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