Hey fullas, Ive seen pics of cars that have no one-way valve in the hose going from the brake booster to the intake manifold. Should I install it? I guess it should allow pressure to go from the intake to the booster but not return, is this correct? I made a pic so you can see.
Cheers.




Also you can see my percy block off plates.

 

Don't need one on an NA.

 

I'm boosting with turbo, so do I need it?

 

Only if you are boosting and braking at the same time, but yes, it would be a good idea to install one.