[rotorwrench]

I think Bosch has been changing colors on some coils.

The key is getting a coil with the recommended primary ohms specification for any system. If the electronic system uses a coil that no one else produces then the customer is stuck with that brand. Most electronic systems use the 3 Ohm type with modern epoxy insulation but I've heard of problems with the Pertonix coils. Few automobile electronic systems are made with a single coil in this day and age so the single coil systems are mostly relegated to the aftermarket industry with overseas manufacture.

I think I'd try an Echlin with the same or recommended ohm value but a person just never knows what your going to get now days.