Hiro,
My 370 came with th fujitsubo already on it from Japan, I just added the cats as it was to quiet,
I didn't want a loud system on this car like I had on the 350 the drone was awful on long journeys,
I get zero drone and a sporty sound kicks in at about 3500-4000 revs.
Heard good things about the Milltek system and if Tarmac recommend it maybe that's the way to go for you...
We'll have to have a meet up again sometime mate....