to run alright. I personally dont think the Iridium plugs are good for my setup or for any z32, i use ngk single platinum (they dont have double platinum) and doo pretty good. As far as the MAS right on the spot plug came unpluged and i couldnt tell from the cover, im missing the filament that makes the plug stay lol, anyhow many many thanks for a very frustrated and happy outcome, i guess i will post some pic of my car, not as worthy as a twin but it's a z loved hate relation. Thanks a bunch guy's