What sized bolt goes in the middle front/center of the crawford upper plenum to bolt it to the lower? I used a bolt too long last time and snapped it off at the base of the lower plenum and have been using RTV sealant since (bad bad, I know) but since I'm swapping my lower manifold out I figure I might as well replace it. Anyone know the size?

 

Not sure if this helps.

Heres a link to the actual install directions.

 

Why not call Crawford's and ask Doug? I'm sure he'll help.

615-327-4159