You can buy almost everything that you need at walmart. They are going to sell you basically the same parts at an audio store for more. I bought the wiring harness and the little tools that you need from walmart. The kit to bypass the amp i got at a store called "audio express" any audio store that knows what they are doing will have the cable to bypass the amp. Don't go to best buy they are a bunch of idiots and they will try and sell you a part you don't need. They tried it on me and i argued with the guy for about 30 minutes. GOD they are a bunch of morons. Good luck!