hi jae,i had a supposedly MAF friendly,dry cotton mesh ind.kit on my 00m/y uk turbo,after a month the MAF and Co2 sensor were screwed to the tune of 230 quid,no other mods. apart from b/box like yourself.
I think most of the guys on here would tell you to bin it and fit a quality panel filter,but, of course you would need to source all the o/e parts,that will now be missing.
Then again i'm only going on my past experiences,i could be talking pash,if so i'm sure someone will correct me.