do it will be far less than having a shop do it all the time. if your gonna use nitrous your more than likely going to foul a plug from time to time, and will have to change plugs more often. there is a good diy writeup in the tech section <-------- also i may have freaked out about the whole platinum plug thing, there may not be a warning on the nitrous kit about it, but its common knowledge especially for a speed shop. i definately wouldnt use them b/c of the experiences i have seen other people have had w/them especially z's. heres a good article on spark plugs by the way [ http://www.centuryperformance.com/spark.htm ]
