Intake pipe diameter

hi all, have fitted a gta intake pipe with gta BMC CDA airfilter to my 2.0 TS, but it took a lot of reducing from the gta intake pipe to the 2.0 MAF housing, so is a bit of a botch job, and i dont want to remove it unless its being replaced.

so, can anyone tell me the diameter of the standard gta intake pipe, at any point between airbox/filter and throttle body? im assuming its the same all the way.

need to know what size silicone reducer to buy, if i need two, and a connector between, etc.

cheers in advance. had a search, cant find much of use.

The OD of the pipe from the throttle body before it connects to the MAF housing is 80mm.

nice one, cheers for that!