Got my H/C head off the classifieds here but showec up with 14mm plug holes
I used to run bosch 409 plugs but cant find with a threaded top terminal
So what other 14mm plugs are guy running with coils with good results
Bob, I ran the platinum Bosch plugs for a long time. The number is FR9HP and they have the screw top and a long reach.
Well Howdy Bob. Finally I can give you some advice. You've been very helpful to me on a few past occasions. I am satisfied with a Jap 14mm sparkplug called NGK platinum alloy spark plugs. Part # BPR5EGP.. The threaded Top is removeable.
If you choose Bosch plugs with a none removable top check them for resistance with an ohm meter from the top to the center under the bend able gap. Every one I have checked had resistance.
George thanks for the kind words glad to know i helped someone sometime.
The "R" in BPR5EGP means that it is a resistor plug. I understand that resistor plugs are not good for our coil ignition.