Originally Posted by
FF25510
right but if you click the engine pdf file of xp 3.5, the exploded view said it was a Max .12 RP3.5, so i think they are the same.

The part number on the crank is the same as on Nova 12 LS5.
From the pdf on xp3,5 as it says rp3,5 makes this engine a short stroke 14.04 and bore 13.8. As I wrote before it will make this a develepment of RR3 and close to the SL3 and XL3.