Actually now that you ask I wonder the same thing did you try the Injen caí yet? I’m about to install my Ktuned 72mm tb which version did you got ? I got the budget one just want to get the acuity tps sensor and I will install it
i just purchased a K-Tuned 70mm TB recently. It is 70mm at the butterfly plate and tapered to 74mm at the knife-edged opening point.
Measure the ID at the knife-edged opening point which I am guessing is 76mm ID - that is if K-Tuned follows suit on the taper degree. After you know the ID then start calling various CAI manufactures and find out what their ID's are, of course you will be limited to their design based on your upper radiator hose.
I make custom transition pieces for this exact problem needing to match ID's from the TB to the end of the intake pipe track.