I need to know the size of the bolts/nuts which is needed to connect the lower manifold to the 13b, LIM to UIM, and the UIM to the thing connected to the throttle body. This will help a lot for my 13b swap. Thanks

 

just a guess
10 by 1.25

 

Bolt and nut sizes are covered in the Archives.

I'm fairly sure that all these are M8 x 1.5. M10 is way too big.

 

Just get them from mazda.. they aren't that expensive..

 

Would you get these at any Mazda dealer and ask for their intake manifold bolts?