'06 4Runner Alternator Capacity
 

I have an '06 4Runner SR5 V-8 4x4. Can anyone tell me how to find out what my alternator is rated to put out? Also, does anyone know any options for a H.O. Alternator? Maybe the newer technology in this '06 can handle the load but I have a feeling I am going to need to upgrade my electrical capacity when I install an Alpine PDX-1.1000 and a PDX-4.150 having a combined fuse rating of 160 amps.

Thanks,
engdave