So the dealer phoned me at 2pm system complete bring car.With great anticipation i took my scale and vernier.
Standard system comes off in ten minutes.Exhaust is cut and BMW performance system fitted in another 15 minutes.
Here are some stats.
Standard system weighs 12kg.
BMW performace weighs 9kg + 2kg for tailpieces + 1kg for clamp = 12kg. So there is no weight benefit.
We took a decibel reading on the standard system revs 1000 to 3000 with reading 84db.
We took a reading on the BMW performance exhaust 1000-3000rpm with reading 84db.
Pipe sizes all the same except for the tailpiece that now has an internal diameter of 63mm and not 54mm as per standard.
So no extra decibals.
Only way to distinguish the performance exhaust is a badge on the bottom of the silencer,the silencer is perfectly round, and the tailpieces have an M on them.
So far looks like 11k for cosmetics.
![[Image: 20022014265.jpg]]()
Standard system comes off in ten minutes.Exhaust is cut and BMW performance system fitted in another 15 minutes.
Here are some stats.
Standard system weighs 12kg.
BMW performace weighs 9kg + 2kg for tailpieces + 1kg for clamp = 12kg. So there is no weight benefit.
We took a decibel reading on the standard system revs 1000 to 3000 with reading 84db.
We took a reading on the BMW performance exhaust 1000-3000rpm with reading 84db.
Pipe sizes all the same except for the tailpiece that now has an internal diameter of 63mm and not 54mm as per standard.
So no extra decibals.
Only way to distinguish the performance exhaust is a badge on the bottom of the silencer,the silencer is perfectly round, and the tailpieces have an M on them.
So far looks like 11k for cosmetics.
![[Image: 20022014265.jpg]](http://s28.postimg.org/gkrrvr8tl/20022014265.jpg)