Where can i mod my xbox 360?
It is not a good idea to open up your Xbox 360 and add a mod chip. Doing this is not safe (if you are inexperienced), you can hurt yourself or you can damage your Xbox. Once you open your Xbox 360 system, the warranty is no longer valid and Microsoft will not support your system. There are also cases where Microsoft has banned gamers from Xbox Live because of the use of Mod Chips. Personally I stay far away from modifying my game systems in any way. Especially since there are ways of playing backup games without a Mod. You just need to make sure you can find a service that offers downloadable games with Stealth Patching.
