i got a fun deal today. i traded a guy a spare exhaust i had lying around (just some oem GT over axle tubing) for a CD player, with a wiring harness, and install kit. Now i got it installed and it works fine, but of course i've lost the use of the mach 460 amps. it uses a seperate harness that was plugged into the back of the old unit. now my new HU has RCA hookups on the back. Has anyone figured out how to get the OEM amps to work with an aftermarket unit?