ICM nut size
you've got a get that special TFI wrench. http://www.50resto.com/ has them, but you may have luck at the autoparts store.
Man what a waste of time i went to summit and bought the accel icm that is to be a performance mad for stock igniton but wen i put it on the car idle perfect ran fine but when rpms hit like 2500 and up major missing put old one on run a little ruff at idle but other than that runs perfect ?????
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