If your putting plugs in an SVT don't make sure you get AWSF22.. Autolight or the NGK that cross references with it. The parts store will try to sell you a AWSF32... The 22 or 32 signifies the heat range and the 32 is a heat range too hot for the SVT's higher compression. This caused pre-ignition in my car and it was a royal pain to figure out what the problem was.
