This was a life saver.I needed to have less resistance and this worked amazingly.!!My DC lvl 6 15 now plays full titl without barley getting warm.No faint electrical smell anymore either.my under the hood lithium and lithium 5k and ioxus in back all stay at a perfect 13.1 to 13.2 volts even after sitting with car off for a day or so.Love this block.Went on perfect no customization needed.Thanks for this amazing product shca.!!You guys ship fast ah and have great customer care.I have been a long time customer and will continue to be so.