Just from looking at the pics and remembering the FI exhaust, the bolts will not line up. It looks like the OEM Nismo has 4 bolts in a flat line. The FI used angled flanges on both sides.
That, along with the pipe lengths (not sure if the FI front pipes are shorter/longer than the stock Nismo H pipe) would probably make this a no-go for a bolt up affair. Might be an easy exhaust/fab shop fix though.
I don't want to speak for Sasha though. I'll let him confirm