I believe the intake cam has larger lobes and the exhaust cam was the same as C280
http://newyork.craigslist.org/brk/pts/3978262929.html
Not mine but $150. For those who have been looking for these.
2014 Black Sapphire BMW 328d xDrive
1997 Brilliant Silver C36 AMG 183k miles (SOLD)
1994 Spruce Green C280 176k miles (SOLD)
Drexel Business '11
I believe the intake cam has larger lobes and the exhaust cam was the same as C280