Well my dad has had a dr.performacne chip for awhile and went to something different because it wasnt working so I sent it to dr performance and they took a look at it and said that it was an old still so they are sending me a new chip and before they sent it I asked them if they could put a different tune on it so they put there pk(pump killer) tune on it. So I would like to know if anybody is runing this pk tune and how it runs im going to be stacking it with my smarty.