I am sure this has been asked many times.
Do you need a map to use say a short ram induction kit?
Or can you get one that the original sensors plug into?
So long as the pipe diameter remains the same you'll be mostly OK with changing the induction kit. Some of the perrin ones come with a bigger maf tube though (you'll spot the bulge) so do check and be sure.
Even with the prodrive map the target AFRS are pretty rich so you'll be OK if it leans you out a little bit.
Not wanting it for bhp gain. Have enough ;-)
But heard one the other day and sounded nice without a BOV.
Just wanted to know more about them, hard to know what they'll be like on your own car.