Anything that doesn't touch the engine block will not void the warranty. So both of those will not void your warranty and you can probably get the dealer to install them for you. Once you touch the engine block like "intake manifold" then your warranty is void. Also touching the ECU will void your warranty (I'm not sure about that one).
Also, you don't have to stick with a brand for anything that doesn't void the warranty. You can use any manufacturer you like.
Also, you don't have to stick with a brand for anything that doesn't void the warranty. You can use any manufacturer you like.