The current and extra spark duration of these mags will melt the blue plastic and fail quickly. You must also use the shorter screws supplied with this rotor. Standard MSD screws are too long and will interfere. This version of the blue rotor has been re-worked by FIE with a BIG brass rotor tang, brass heat sink and is epoxied on. The rotor is also balanced after assembly.
Racer must choose Left-hand (CCW) rotation or Right-hand (CW) rotation when purchasing from drop down menu.
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