One wire connection with side post design for clearance. Gold post for better connections. High speed balanced rotors for high RPM. Rotor slip ring welded and epoxy to resist vibration. 2.8 race pulley included. Deep V-groove, coated steel baffle plate for high RPM and cooling. Smooth cut rear housing for clearance and weight savings. Total weight 9.73 lbs.. Black thermo coating for cooling.