Originally Posted by EK9er
Cause Ive tried a gsr head w/ si wiring some of the wiring wont plug in right, so your telling me I can only use one or the other, si head w/ si harness or gsr head but I would have to run all gsr wiring??CRAP!!
I think you should be able to swap some gsr plugs onto the si harness for the ones that don't plug in right. There might be some other stuff you have to do to make it work right, but I'm not positive. The gsr wiring harness definitely won't work though because of what the others said.