So I am thinking about getting a ITM. It only bolts up to a 66mm ITB. I have a 93 prelude vtec. I want to upgrade both. So what is the stock bore for the ITB? Also if I go with the upgraded ITM would 66m be enough to get the gains I want for the money? Help... I need some advice on ITB and ITB, which and what for the best gains for my $!