mines all taped up but only reason I've not ripped it out is due too the rubber grommets that hold the cover on as the foam seems like it acts also as a buffer, not sure how long they would last without, reason i asked at the foam place as wanted it free and the fire rated glue lol, the foam surround is as bad, last time got a price for that it was like 90 quid wtf lol, sod changing that, bonnet sound proof is sound though.That foam does absolutely sod all to reduce the clackety ole racket the PD engines make so I personally wouldn't waste my time and money trying to replace it.
Silent coating the bonnet would be more effective if you're aiming to reduce engine noise.
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