Modular Combo Block (4 Port & 2 Channel) 1 / 8NPTTurbosmart Modular Combo Block (4 Port & 2 Channel) 1 8NPT Features Billet (6262 T6) Aluminium Construction Modular, Expandable System 1 8 NPT Ports 3 Channel (Sensors) and 4 Port (Reference) The Turbosmart Modular Combo (Reference & Sensor) Manifold, is an expandable, professional solution for remote mounting expensive and delicate sensors aswell as a shared reference distribution manifold away from high vibrations and heat such as those found in