Hey Dillz, I have something very similar to the ebay one, I had all this in my old BF ute , I did end up putting the 6.5inc's in the rear. just had to trim (with a drimmal) the inside of the door trim, where the oem speaker sat. all works great! how big is the standard sub?? should I replace whit something bigger in the same spot? as it sucks with producing bass.