Originally posted by 99tour:
Your information on the AGSF plugs are wrong. They do have more threads but they do not stick into the cylinder any further than the AWSF plug.
I strongly suggest you look at the two plugs side by side.They most definitely do stick into the cylinder an extra 5/8"
This sits directly into the incoming air flow from the intake valves and leaving airflow to the exhaust valves.
Major detractor for promoting good airflow and proper chamber swirl.
