Hey guys. Been a while since I’ve posted, but I finally pulled the trigger on some parts for the car and plan on doing some if not all in the next few weeks. So, that being said, I know this topic has been beat to absolute death, but I have a question about installing a double din. I’ve noticed that some people are saying to use the metra harness 70-5510 and some are saying 70-5511. I can’t really tell the difference because they both seem to work from what google says. I noticed one has RCA’s and one doesn’t. I’m hearing mixed things, but I want to make sure I do it correctly. I plan on keeping the factory mach460 system as it still works perfectly. So which one is the one I want??