Going to battle it out with Mitsubishi

[Kracka]

Originally Posted by C3L1CA

How would the over-rev damage a spark plug?

Not so much the over-rev, but the detonation of bouncing off the rev-limiter. The X plugs are much more fragile than anything the DSM/8/9's ever had to deal with, probably due to the smaller size; a lot of us have had a spark plug failure in one form or another.