demon tweeks do them on special for £365 with a k&n panel filter
get the handset in the post, register the hand unit and your car details using the software provided
then go to the car, plug in the OBD port just above the throttle pedal, next to the footwell light.
it walks you thru step by step uploading the cars file to the handset
plug handset into laptop, software automatically sends the file to super chips
wait a few minutes, get a text message and email to say your map is ready, plug in hand set to lap top and download file from server
plug back into car, walk thru step by step again, file uploaded, car much better, smile much bigger
the end