Hi Jonny
I have a Euro 4 car (Nov 2017) and have done c 3,500 miles, and now want a little more noise and power.
Do the mods you had affect your warranty?
Presumably KH are also your regular dealer?
I am up in Fife and my dealer is Revoloutions in Perth, so I would need to bring it down to KH or get a Garage 56 kit.
Cheers
Geoff