I have a 11.7:1 B18C5 motor tuned with 100 octane and I only race the motor (40min Sprint type road races)

I tuned the motor with NGK 4644 BKR7E...I have a set of NGK 2668 Irridium IX heat 8 but I have herd horror stories about the tips falling out so I don't really what to use them

Is there a NGK Heat 8 Platinum plug for the B-Series motor???

Thanks

 

The iridium tips may become damaged in you tried to gap them with a ramp style gapper. Which is why most iridium and platinum plugs recommend not to gap them.