HFC? Identifying parts under car!

Asus_

hey guys

Recently bought a 370z with mods and uprev. I'm getting an etune cause god knows what kind of tune is on this car at the moment. I need to compile a list of mods it currently has for the tune... so far i think ive got everything down expect for underneath. Hopefully you guys can help shed some light!

Here's a few pics of the undercarriage. I apologize they aren't the best. They were taken before deciding to do the tune. I WILL be getting better/clear pictures later on today incase these aren't enough so that maybe it'll help identify anything missed. Also. I know i've got an ARK CBE.. based on my research it looks to be a GRIP if anyone can confirm and i doubt that i have the stock cats

https://ibb.co/nNyTaw

https://ibb.co/fPXAoG

Also anyone know what the red tube going across is?

https://ibb.co/chKqoG

https://ibb.co/n18Taw

https://ibb.co/fTPehb

https://ibb.co/cGGs2b

https://ibb.co/hORQNb

https://ibb.co/nAUehb

https://ibb.co/mQ2oaw

https://ibb.co/fupZFw

https://ibb.co/miNoaw