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why are you gonna swap out spark plugs... I am pretty sure they come with iridium plugs anyway... you would just be replacing very very good plugs with the same plugs or worse...?
Originally posted by Tycoon has anyone done this mod to his/her IS yet?
this is not considered a mod, and will not do anything for your IS unless you factory plugs are insufficient for some reason (ie: forced induction)
Does anyone know how many we need for IS?
Will there be any warranty problem?
Thanks.
the fact that you are asking how many spark plugs our cars have leads me to believe that you are new to cars, as almost all cars have 1 plug per cylinder, which would total 6 or the IS, i would suggest taking your car to a shop and asking their advice on how to make your car faster, then paying them to follow through.