I guess it depends on how much you are looking to grow with your ignition system. If it will see a little bit more street than strip, like 30/70 I would look at the digital 6 box might be better suited for street driving. If I remember correctly it has a host of additional bells and whistles over a standard 6 AL box but is more of a steet/strip box when compared to it's big brother the strip mostly Digital 7. I have/had a digital 6 in my car...