Ed

If you want the most from your motor run a set of NGK JR9C.
I run them in my 1999 944 SSie. It has 11.5 in it also.
Now here is where you crap your pants! They are Suzuki plugs!

If you don't believe that these plugs make power, just give Bruce Meyers a ring at BCM. Bruce has stated that of all the plugs he's tested, that these make the most power on the dyno.

I put nothing but these in my 944!

Art