4 replies to this topic
Posted December 11, 2001 - 12:58 AM
I used one in my 400F but have not tried one in the 426 yet. I felt it made things a bit snappier(is that a word??) but did not notice any horsepower gain. I believe it is a good choice for a replacement.
Originally posted by lewichris:
try a CR8EK by NGK