They don't mean that they are pregapped for a specific car!

[Jay Laifman]

For what it is worth, I just spoke to Bosch. They said that while the plugs are all pre-gapped - they mean at a set point, usually the middle of the range for that plug. They don't mean that they are pregapped for a specific car. If the pre-gap doesn't match what yours calls for, as Nick said, it should be changed this is not for the multi point plugs. The guy at Bosch also said that for the platinum single point plug, you would gap it at the same point as you would a copper plug. Though some people report on these web sites getting better results with a wider gap.

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[Kerry at Pelican Parts]

The gap of a spark plug only determines how much voltage needs to be generated to jump the gap. Now the combination of voltage and amperage does determine how much heat the spark generates and that does have an effect on your flame front travel and combustion propagation. I don't know if you have a distributor cap or you have coil over plug or even if you have the CDI ignition so it's hard to answer your question. Gap the plugs to your cars specifications since that is set to your coil output. The pre-gapped plugs may be for a different car or a different application.

- Kerry