I think the t/body is the same size on all, but the difference of 10mm is to do with the hose diametre going to the air inlet filter housing.
I used a piper-x cone (<£90) which gives a suitable noise, not too loud, and it is the type for the ZS 180 but adapted to fit the ZT 160 inlet, which should be similar to the 190. The rubber adaptor from the t/b to the filter housing is the same on the 3 V6 ZTs but differs on the ZS because of a different filter box.
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