congrats nick - delighted that you are enjoying your car.
I would doubt very much if you are burning your clutch.
The Mazda clutch is very robust and in my experience more than up to the job for the M3W.
Most likely simply assembly material or the exhaust curing etc.
Do not worry - unless it persists.
BTW my garage still has tyre marks on it from my rear wheel - four years on!
