I have the mate 20 Pro and I love it. It takes fantastic pictures I can't fault it at all. Am I worried? Nope not at all its just a great phone really. I actually think it's a Chinese iPhone really lol.
I love my invidia gemini paired with highflow cats, it sounds awesome. Even with standard cats it sounded great. Incedently there is 1 for sale on here for a great price. Not sure if it will fit the 350z though.
My brother has an M135i on a 63 plate it's a very quick car. We went to see his friend who owns a specialist garage to see about a remap, he was told with just a remap and no other mods it would go from 315bhp to about 380bhp.