J&M 360W Performance Series Amp Kit JMAA-3600HR06-RC Custom made plug-n-play wiring harnesses are included with this amplifier kit Fits models with the H-D HK radio Amplifier itself measures 6 1/2in. x 4 3/4in. x 1 3/4in. Speced at 90 watts RMS per channel X 4 channels, (360w total) driven continuous into a 2 ohm load @ 14.4vdc