although a dyno would definatly show more info than needed. i just did want to spend that dough on that. overall i definatly think it improved IDLE QUALITY, ACCELARATION, ACCELARATION SMOOTHNESS, and overall helped slightly in drivability.
WoW so you will spend 14-24 a plug but not 100 for one run on the dyno to see if they help HHMMMMMMM odd.