yes they remind me of Euro N53 Stock Exhaust manifolds, Euro 5 compliant. Parts 18407568613, 18407568614.
I wonder if these N53 parts would work too, and if so, which would flow better.
Which , in turn look like 2006 130i/330i Euro N52 exhaust manifolds,Euro 4 compliant:
130i:
http://www.dparts.com/onderdeel/2890...-87N-Hatchback
http://www.dparts.com/onderdeel/2890...-87N-Hatchback
330i:
http://www.dparts.com/onderdeel/2879...erie-E90-Sedan
http://www.dparts.com/onderdeel/2879...erie-E90-Sedan
The plot thickens...