Does anyone have the model number and manufacturer of the amplifier bypass.

not sure what you are taking about............

i'm talking about the plug you put between the two factory plugs that go to the factory amp. The one that lets your deck speakers play without going through the factory amp.

still not really sure what you are taking about - but maybe this is it -> http://www.logjamelectronics.com/auxford.html

maybe i'm looking for the wrong thing. Well can you explain how to get the rear deck speakers to play without using the factory amp in the back. I want to put some 4 way 6X8's back there but want to use them as regular speakers, not as mids.

the rear deck speakers are sub-woofers - driven by a seperate bass amp that is mounted underneath the deck.

so if you want to replace them - but drive them of the head unit like the door speakers - you can't - or at least - I don't know how without adding another amp to drive them.