that is JL audio XR comp series crossovers in the door there, with pretty blue wires stretched nice and tight to the front channels...i am assuming the ones in kickpanel and not the doors though..i am sure he has either bypassed those or just run the doors off the headunit..clean install though..i am also assuming he has a stinger battery under that shield (heat/mud/dirt??) and that either came with the battery or his installer has made that for him custom..doesnt look that hard to make though.looks like some thin 1/8 white plastic heated up and bent to fit the shape of battery with a little extra room at the one side for his wires..i think it would be a bit harder if you have a CAI though..after you have it shaped just drill your holes for wires and for your voltmeter<--makes no sense so close to the battery though...only show points..and then screw down your fuse holder and your off to the races..