Exhaust Manifold with SAIS, Bolts or Studs

On a 2nd gen with SAIS (2013+ I think) are the manifolds held on with studs, bolts or combination? My Tacoma without SAIS has 6 studs all the same size but the SAIS manifolds are much thicker up top for the air injection stuff. Are they just longer studs or are they bolts? Surprisingly, my local Toyota parts department can't seem to figure it out and I don't see any schematic that shows them..

Thanks.

 

100% studs and nuts.

Unsure of length. The schematic doesn't show length of fasteners either.

 

Cool, if anyone knows length and or part number, I'd appreciate it..