Turbosmart Modular Reference Distribution Block - 6 Port 1/8" NPT. Turbosmart is excited to release a new Modular system for vacuum reference and sensor distribution. The modular system includes vacuum reference distribution blocks and remote mounting sensor manifolds, which allow you to mount expensive and necessary sensors away from heat and vibration. You can have all reference distribution blocks, a 3 channel sensor manifold, or a combination of both or build your own with any elements to suit your needs! The