As above, after fitting my bias box I'm looking for something to blank off the vacuum hose on the inlet manifold but I can't find my old vacuum hose to get a thread size. Any help would be appreciated guys as I don't fancy wrecking the thread on my manifold.

 

I've managed to find something to fit perfectly. If anyone else ever needs to know I used an audi/seat sump plug

 

Hi

If I´m not wrong the INLET MANIFOLD ADAPTOR FOR BRAKE SERVO PIPE is 1/4" NPTF x 16mm.

Hope this help.