Can anyone confirm the standard fuel pump part number fitted to this model?

I just removed the pump to fit a AEM 50-1000 however I found a Walbro GSS341 is currently fitted. From all my searching I've found this walbro pump will be good for 400bhp. I cant see myself ever exceeding this so I'm in two minds whether to just put the Walbro back in and sell the AEM or stick the AEM in just in case.

Thanks in advance.