They are very high figures from a stage 1 tbh, but with the additional bolts achieveable. I have just gone to stage 2 with an Evoms CAI and Milltek 2.75" dp/sports cat, estimated figures from this are 260 bhp. I'm not chasing figures personally, I'm more interested in the driviblity, and imo its pretty awesome.
I would recommend having the map tweaked to accomodate the enchancements mate.