2008 f150 crew cab, more bass

i just bought a 2008 150 crew cab, and im looking to get just a little more bass out of my system. i want to keep the factory HU (Not sure if it has the factory sub output yet) and add a powered mtx 10" sub. i know it sounds easy right!!! well i and one who is particular on keeping that factory look. so im not looking to cut and splice any factory harnesses. is there i harness out there that will allow me to plug into the back of the factory HU and plug in to the main factory harness, or something that will allow to use this configuration with out gutting any wires. i hope that when i pull the HU i will find a sub output on the back then it should be a simple plug and play i hope!!!

^^^^nailed it on the head. if you wish to not go the mtx route, you have the option of a l.o.c. and multiple comanies make nice enclosures for your app that will allow you to run a speaker of your choice.