Optimal solution for upgrading vacuum connection options BOOST products 7-way vacuum manifold / vacuum rail Optimal solution for upgrading vacuum connection options Universal 7x distributor for vacuum lines in black You can insert this distributor into a vacuum line and create up to 7 additional outlets. The manifold has 6x 1/8" NPT and 1x 3/8" NPT female thread connections. These can be fitted with our connection nipples for hose assembly, for example, or with plastic vacuum lines. The ideal solution for the engine compartment to create additional vacuum connections! Connections: 6x 1/8" NPT, 1x 3/8" NPT Material: