Theoretically they have a full 3/4" of threads so they should be more resistant to spark plug blowouts. That being said, nothing is completely bullet proof but it is a step in the right direction.
Theoretically they have a full 3/4" of threads so they should be more resistant to spark plug blowouts. That being said, nothing is completely bullet proof but it is a step in the right direction.
This is correct, the heads do have a 3/4" threaded spark plug hole compared to the factory heads that have about 3 threads in the head. I have yet to see anyone blow a spark plug out of one of our heads.