^thanks! That helps a bit. I just replaced my Vanos solenoids today and had to remove the intake tubing and maf from the TB and was able to confirm that the factory 4.6is throttle body has a rubber sleeve outside the circumference, and that my new big bore n63 throttle body attaches perfectly with the stock elbow.

The issue is I don’t think the other end of the TB elbow will direct connect to a larger 4” maf. I’ll have it in the mail next week and will see how things look.