The MBE9A4i has four ignition drives, that can be fired either sequentially or in wasted spark mode, depending on requirements & set-up. The normal MBE9A4i has built in amplifiers so there is no need for expensive external units. You can use four individual coils (standard coils as used on the Suzuki hayabusa) or twin coil pack (GM, Peugeot:COIL-4 or Ford:COIL-9).

It is most commonly used with a wasted spark coil pack (COIL-4).

If you have coils with built-in amplifiers, an MBE9A4i can be built to order.