HyRev 7500 ECU box

I keep a coil, ecu, and ballast,even tho you can bypass the ballast. I don't think its a good practice though
It's not with a coil that requires one, but it'll get you home. I think what I am going to do is get another hi rev box and ballast and install them next to their working counterparts. If one fails, all I need to do is transfer plugs.