you cant bridge together 2 factory amps, they will be sending power into the output of each other which will trash them, unless you mean not wiring them together and running each amp to say a separate sub but when you do that you will be sending too high of a frequency signals into the subs. just do it right and get a sub amp.
Got to love an ORVIS guy...
IRO 5.5", Front LA & Double Sheer TB, Rear Adj SA and TB, JKS Quick Discos, Bilstein 5125, 265/75/16 Nitto Terra's, Cragar 16x& Soft 8s 4" bs
JCR Stage 2 Sliders, IRO Trans Skid, Carolina Drive shaft, IRO exhaust