I can't just say yes or no. I know of a few stock cars that use a .43 Why are you changing your gap anyway? Are you having problems fouling plugs, them not sparking enough, or what? I would try putting the plugs around stock gap first and then going from there. There are many indications of color and the look of a plug to determine what is happening. For example, Too hot would result in a white electrode cause by too lean or the gap off. Detonatin = cracked or chipped insulator. Usually caused by too much heat and not enough fuel ( You will hear a crushed aluminum can sound as well as some pinging) If the stock gap seems to work fine, then leave it. I also recommend you putting ngk v power or some sort of copper plug in, it ignites a lot better than platinum on a turbo car.