Anyone got a good link to the diy airbox mod

[audiv8quattro]

Hi all, ive seen the airbox mod mentioned on here a few times, just wondered if anyone has a good diy link. While my cars of the road im doing a few things to it, just sprayed front rings and surround matt black, sorted out my blowing exhaust and generally tidying the car up abit, thought id give the air box mod a go while im at it, why not???