Hi Frank,
If the bolts diameter on your V2 are M8, then there is a very high chance that the torque value between the V4 and the V2 is the same.
However, please note that the 2 bolts that attached to the cylinder head actually have higher torque value then the one goes to the main frame. I am guessing this because the main frame aluminum properties might not be as strong as the aluminum on the cylinder head.
I post the screenshot of the V4 service manual related to this 4 bolts below (on 2 separate pictures), I hope this will help.
note: the picture below only show screws #2 as Ducati forgot to show screws #3
However, rest assured that I checked with the table in the user manual for bolts torque value and the screw#3 with torque value of 35Nm are the bolts that attached to the cylinder head for sure.
Actually, let me post the screenshot of the torque tightening table for the V4 subrame right below here:
Oh, another thing, when you select your Titanium bolts (if it is an M8 bolt), you might want to check to make sure that it have "safety torque rating" higher than 35Nm because with ProTi, they mistakenly sent one bolt to me with "thinner head" and the "safety torque value" for this specific thinner head bolt was only 35Nm, right at the limit.
So I had to purchase a different bolt from ProTi which have slightly thicker head and have "safety torque value of 38Nm". Especially considering you will go to the track and will have a lot of body movement (and put a lot of one sided load to the sub frame) when you corner and hang your knee to the track.
Ok, below are the 2 pictures screenshot with illustration
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