The part number is 058 103 213 ( Breather Tube Engine breather to valve housing). its a breather tube for my 1998 audi quattro. it's a 1.8 liter turbo. Mine is in three pieces and cracked in various places. i just took it off and need a replacement one before i put my engine back together. it's kinda L shaped and a little twisted.It connects underneath the intake manifold. If anyone has one please contact me at 360-333-1309. My name is Nolan. Thanks.