BMW M30 M90 Engine Heads Library

That sounds good! Thanks for the tips Fritzie!

By the way, anyone knows why the center plugs were removed from the rocket arm axle and when it happened?
 
This is an interesting thread.

Would be very useful to classify things a bit. For example:

Evolution: Changes from earliest to latest... and why

Interchangeability: What heads work with which blocks, which intakes, cams, etc

Specs: Valve sizes, combustion chamber volumes, etc...
 
The plugs had a bad habit of backing out so changes were made.
I have NOS plugs if anyone needs them!
 
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