Thank you folks for taking the time to reply with really useful information. I'll keep the steering in situe given the risks of incorrect attachment and the unthinkable consequences! I have often fitted aftermarket pipes to bikes over the years but this has been for the benefit of aural gain - by the sounds of it, there are real mechanical benefits for adding stage 1 pipes to the M3W so I'll go ahead and get a set. Is home fitment straight forward?

Thanks also for the links to aftermarket parts and also for the list of contacts who may be able to help.

On a separate note, the previous owner had vinyl decals of his company logo added to the car - whilst I think they look quite nice, I'm not sure about driving a vehicle which advertises alcohol and am considering changing them for something more mainstream - what do people think?

Thanks again folks.

[Linked Image]
[Linked Image]

2017 M3W