[yorkie_chris]

"It's a figure so technically it should be the same with my sports zorst"

No, you're changing the gas flow of the whole engine so technically it's nothing like the standard system, you have less backpressure at all rpm.

You have no idea whether the FI int. kit is going to work with that exhaust or not, and what bhp it'll end up putting out.

The kits tend to be on the cautious side, so I'd fit it, then dyno it to be sure. But, if the combination of kit + system puts it to 33.1bhp ... it's unlikely that anyone will care.