Hi Geoff
Ive never had a problem with MOT yet but it depends on the tester. I can direct you to the one we use who understands in reality these are not dangerous. If we needed IVA they definitely would not pass.
To the question of noise. I can only speak from my opinion and what I have observed by others. The interesting thing about these BMW sixes is that the sound loud going through the gears or accelerating but when cruising seem almost quiet. Andy (ericholm) was on the fence about building a kit till he followed me in my Kali and he said thats what sold it to him. Incidentally I'm going for a louder, new full stainless, straight through exhaust upgrade on my car at Longlife in a weeks time. I currently have two silencers (if you can call them that).
Bryn Webber, the owner of the grey Koupe, loves his sound so much he just drives it around just to listen to the sound. It's intoxicating. If fact he said his stereo fuse has blown and he has not bothered to replace it! Bless.
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