Anoying rattle after Test Pipes and oil problems, HELP!!

[Iantfox]

Hi everyone, I installed aam resonated yesterday pipes on my z recently and it is making a very loud metal on metal rattle. I have always had fast intentions cat back on the car and the sound sounds like it is coming from somewhere on the front/middle of the car. It is tuned but I don’t think that has anything to do with it. I also have cold air intakes on it. I posted a video on YouTube but can’t figure out how to upload it titled: 370z rattle after test pipes. Please can anyone help, anyone had this issue with there z? I just want to be able to enjoy the car again.

Unrelated to that, I also did my oil change recently, the same way I have always done it on my z for years and afterwards, there is a ticking sound coming from the engine, not the usual vq tick it has always done that and I know what that sounds like. This is another tick louder coming from somewhere else. Once again if anyone has any advice it would be great. Checked oil on dipstick after cooldown for 6 hours and the oil level was at the H mark