From two known PFL cars with IC and map, 440hp 650Nm and 445hp 675Nm, these also had a HPFP.
With the down pipe, you "should" see, as said above, 450-460 hp. Depends on your car though, some may get a little more and some do not get above 440, seems to be a ceiling on some cars.
Also depends on the tuning company of course.
S.