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yea i have the denso iridium plugs in my 97 gst and ever since i put them in i have bad miss's in high rpms. What is the cause of this? When i replaced the plugs i also did the wires with msd superconductors.
a lot of dsms just experience idle/misfire problems with them. you can try em if you want, but for how expensive they are it may not be worth it. just about everyone uses NGKs because they work great and are oem. use BPR7ES plugs if you are stock or mildly modded, use BPR6ES if you have a bigger turbo and are running high boost.