I use the fox miracles too i am not going to pay a 9$ a plug just for the O.S. name. My uncle had a st 90 and put a number 8 O.s brand new in it and the motor wouldn't half run and we went and got a old 7 year old fox plug out of a old 40 motor and put it in and it ran like a top.. $9 O.S. or $2.56 for a Fox
no brainer