Do you support Dentsply Xive Friadent implants and multiunit for full arch bars and prosthetics?

Yes we do 
It is called the "T-Series" in the NT Trading Library. 

Thank you

do you make Ti thimble bars for full arch cases? $300??

Yes we do. 
If you want High Definition, it only costs $300 more.

I saw you do chrome implant bars. Are these designed for porcelain application? If so do you have a sheet on CTE for porcelain application. Also is this something you can design from my scan? Thanks oh saw the answer to my first ?

They are approved for Metal Ceramics. 
For more information please visit the Bego M-CO Offical site. 
As of 11-10-2021 we do not offer design services for bars. 
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Thank you

Do these bars have the connection milled into the bar or do you need to use ti-bases with these bars

As long as the bars are Non-Engaging we can mill them. 
We do not mill interfaces.

Is this $599 per implant? per tooth? or per arch?

Per Arch regardless of the number of implants.

is this Bego chrome cobalt bar for firing porcelain directly on to?

Yes.

is this better than a titanium milled bar for an all on x case?

We prefer Titanium.