Replacing stock head-unit?need answer fast!!!!

[1997gstterror]

Im upgrading the head unit in my 97 gs-t. its got the infinity sytem already in it. do i need to bypass the infinity amp or just use a wiring harness and let the speakers still be powered through that amp?the head unit puts out 52x4 already.thanks

 

[scorpion]

From what I was told by the guys at the local best buy, the wire harness that they sell is straight plug and play, it bybasses the factory amp and runs off of the aftermarket stereo. I just installed a Sony and used the harness they sold me and it works and sounds great. Hope this helps.

 

[1997gstterror]

thanks i thought i was gonna have to run all new wiring