greddy type s fitting

[H_D]

does anyone know how its plumbed in. it has 2 vacume nipples on it. do i connect them both to the inlet mani?

 

[Mark-ep91]

only the bottom one goes to the inlet mani other is left blank afaik

 

[Mark-ep91]

cancel that man just searched seems the top port(biggest nipple) goes to inlet mani, and the small nipple goes to the intercooler piping boost source or the turbo vacum pipe(basically any source before the throttle body.

doing this is supposed to increase responce from the bov

the other way is just use the top port to inlet and leave the bottom port vented to atmosphere