Oh fiddle sticks
Ok
If we all agree that a 1.09 rod is lighter than the same .990 rod. Bigger hole
If we all agree that a 1.09 piston is lighter than the same .990 pin piston. Bigger hole
then Most .990 pins that come with shelf pistons are 2.930 long
then most 1.09 pins that come with shelf pistons are 2.750 long
Guess which one has less bobb weight????
Check the gram weight on the pins that come with the pistons you are ordering. Those light weight .990 pins are not CHEAP but can be had.
Diamond will make any change to any shelf piston for 40 bucks. In this case a pin size change. No customs required.
Todd