Does anyone know off hand the DIA of the vacuum port on the S4/S6 brain, AAN? I am about to order some compression fittings and a "T" from McMaster-Carr for the boost gauge. I don't even want to step into the garage let alone lift the carpet and pull the brain out. At the moment it is 37.4°C in the shade in Philly and humid as in a swamp. Thanx in advance. -- Igor Kessel Two turbo quattros.