MFI Parts Parts identification

Dear group,
I have some MFI parts that I want to identify in what car they came
MFI stacks:
2x: 911.110.303.1R
2x: 911.110.301.0R
2x: 901.110.309.0R

Throttle bodies:
1x: 911.110.101.2R
2x: 911.110.101.1R

Can anyone help me?

Thanks in advance.

I think this came from Tom Butler.