Do is gap them down to the aero gap which is 1.0 mm, as the standard gap is 1.1.
Check in THIS LINK
The spark plug gap setting for a Saab 9-5 (1998 2.0l model) is: 1,0 ... 1,1 mm.
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If you're replacing the spark plugs in your car
engine, you'll need to set the gap before reseating the
spark plug. The gap is the distance electricity arcs between the ground
electrode and center electrode. The gap must be set correctly to ensure
maximum performance. Here's how to set the gap of a spark plug.
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