M50nv head vs M50tu head

[Jahman093]

So, I'm doing an m50nv swap and while cleaning up the block I noticed I crack in the head on the exhaust side on cylinder #4.
I have a spare m50tu head that could be used.
Other than the valve springs are there any differences between the two heads?
I plan on using the NV cams. Would I run into any issues with those?
Thanks in advance

[Bimmerguy91]

The head castings are different. M50NV head casting # is 1720840 and M50 Vanos head casting # is 1738400.

I've got a nice rebuilt M50NV longblock with dual intake cams you could just buy and not worry with it ;) haha!

[Bimmerguy91]

NV head also has 7mm valve stems vs 6mm for all the other heads.

[Jahman093]

Would there be any power differences between using one or the other?

[pazi88]

Would there be any power differences between using one or the other?

No.