Looking further at the plugs I think they look good as far as color goes but, alot of that will depend on how the car is running off boost right before you pulled them.
Also, maybe it's my screen but, do I see tiny specs of aluminum on them? Any cracks, chips, or defects of any kind?
Do a search on here about NGK plugs. About a year or two ago there was some good info on here. Also Gumpyvette post some very good links about reading plugs.
Heres some info:
http://www.dansmc.com/Spark_Plugs/Spark_Plugs_catalog.html
Hope this helps:grin: