Alpine i509-WRA-JL Installation (Part 1) | '18 - '23 JL Wrangler / '20 - '23 JT Gladiator 

do we need KCX-F200INT if we purchase factory amp bypass harness and install aftermarket amp with alpine restyle ?

The problem with this is you really need to be able to DIY. You can't trust 99% of the people working on things like this, they break shit and don't say a word hoping you never find out. I had it happen to me on an install where they broke the handle to roll up the window(Toyota truck 99) not the actual handle but inside the door they broke a piece and didn't say one word, I found out when I rolled the window down and then went to roll it back up and the handle came off in my hand. That's some sorry ass people to do that, it wasn't an expensive fix and what if it broke off in a storm and I couldn't put my window up and all my stuff gets soaked.I went back and confronted them and even tried to start a fight by saying out loud a bunch of dirty things calling them names and stuff but they didn't bite.Since they denied breaking anything I just paid for the part and fixed it myself and told them they would never get anymore business from me and I wasn't done with them.