wills Posted July 7, 2004 Report Share Posted July 7, 2004 I just installed the iridium plugs and gappped to .040 as IPD's catalog reccomended.BAD IDEA, car missed so much it threw a CEI.I re-gapped to .030 as Volvo specified and the difference is noticeable..much smoother at all RPMs.I highly reccomend these guys. Link to comment Share on other sites More sharing options...
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