Originally Posted by Maximo

I am not much of a fan of the 97T myself..I tend to run my engines with a little higher compression and those plugs don't like that at all..... The 97T is far too hot for any of my own modifieds and will cause all sorts of tuning issues....The other thing is that in a modified engine you will go thru 3 97T's in the time you will go thru one OSp4 or P5....so your really not saving money in the overall picture with a 97T