This plug is what you may need if you're running very high compression. It's a colder plug so it doesn't overheat with very high compression. Unfortunately, the non resistor plug everyone used in the past isn't readily available anymore. We're running a stock NGK plug in our car that is around 10:1 compression. If it's  lower compression or a 948, you probably want the hotter plug. we also carry stock plugs in Champion or Bosch. Plugs are sold each.