If you have an 05+ NBS 1500 truck with 13" front rotors and rear drums, can you please tell me what brake code you have.. Trying to order unloaded calipers from Advance Auto and there's a million fucking options. I just want dual piston front calipers to do the 05+ 13" brake upgrade. Must be 13" front rotors which I'm pretty sure only came on 05+ with rear drums. Any help is appreciated. Thanks