Interesting review - thanks.
I have just put the full innotech ipe f1 system on my car. With the valve closed it sounds perfect for city driving and normal use i.e. about as loud as stock but a better sound. With the valve open it is quite frankly insane... only usable in the country or at the track in reality.
I recent days (only driven 4/5 days since installation) I have also noticed a bit of a power bump and the car seems to shoot through the rev range a bit quicker.
I have ordered the Evolve tune so will let you know how that goes.
Carbon tips on AW car also for me...