Originally Posted by
studabear
presume its to incorporate the phase sensor
this can be emulated with a phase disc and sensor mounted on the cam pulley
spot on mate its to save you having to fabricate a pulley and sensor bracket for the camshaft, i have a rs turbo and cossie cross breed dizzy on mine! it uses the half of the rst dizzy that bolts to the head and half of the cossie dizzy that has rotor arm and phase sensor and they are both welded together!