Question: are bosch iridium plugs pre gapped?
Answer: Yes, Bosch Spark Plugs are pre-gapped at the factory. The gap is also indicated on the package. If the gap is adjustable and different from the gap specified by the engine manufacturer, it needs to be adjusted. ... Note: Bosch OE Fine Wire Series Spark Plugs (Double Iridium, Double Platinum and Platinum) are pre-gapped.