Brake booster banjo bolt size

CyFi6

Aliens.
Oct 11, 2007
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Phoenix
www.google.com
Was just wondering if anyone could confirm the size of the banjo bolt that goes onto the top rear of the intake manifold for the brake booster vacuum supply. I am not near my car right now to measure and have not been able to find any information on it through searching. I am trying to add another vacuum port to the manifold and thought this would be the easiest way, but not sure if it is the right size.
http://www.summitracing.com/parts/RUS-640700/
Thanks for the help.