ok i know that the driver and pass side use diffrent plugs. well i went to the stealership to get some new plugs since im at 30k so i can do the service. the guy at the parts counter tells me i can put the denso plugs on both sides, sounded shady to me since from the factory they come with ngk's on the pass side. but insted of argue with him i just buy them all, i have just installed them against my better judgement and was wondering if i should take them out and replace them with the correct plugs. thanks for any help.