I notice 123 have on their website to use the Bosch BLUE coil, which is discontinued. Others same the flamethrower coil, or the Bosch Black or Red coil! Some say 1.5ohm, some say 3 ohm Some say keep the ballast resister some say not.
What is the general consensus? I now have the Bosch Black 3.4 ohm coil 9 224 771 008 with no ballast resister fitted and all seems ok .