.040 is the Chrysler recommended gap now, so I wouldn't regap...you are close enough. The only Iridium plugs you really need to be extra careful with are the Denso's. The Denso iridium center electrode is very small (0.4) compared to NGK's 0.6 iridium center electrode and can easily break. Most Japanese SP's are already factory pre-gapped at around .040 anyways and could be why many "feel" their cars start easier and run better.
Iridiums are touted to require less voltage yet provide the same anti-fouling and longevity as platinum plugs. Iridiums come standard on many cars, mostly Japanese, and have the same change intervals as platinum plugs (90-100k miles) but most of those have the 0.6 tips.
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2002 Almond Pearl Limited Edition 27K
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