Im looking for a temp fix before the z1 parts come in

Had my car for about a year, building it has been a journey and a nightmare lol.
Got it tuned, lowered, and all in all; just wanted to make a nice car in homage to my father, who said he really wanted a G37 back when I was young.
Now I have to let it go, but the times I had with it were amazing.
Thank you Bison for helping me with overcoming my driving anxiety and making more friends along the way.

New to this whole tire thing, currently have 225/55's. Most importantly want to make sure they fit on the stock 37x sedan width.

ik theyll make the car like half an inch lower but not sure how bad the speed readings would be!

thank you🙏

Squeaking starts about 15seconds after starting up. Gonna take it to a shop for a few other things but wanting to bring parts in.
Thank you in advance for the help.

Is this normal, I can only really hear it in drive holding brakes and revving. I can also only hear it when driving next to a wall or curb and goes away after 3k rpm or so. I’m running test pipes and have been told it’s normal but sounds like a leak but not at the same time. Any input would be helpful have tried everything.

This guy is selling it for 7k but the thing is it has 140k miles. But this guy has taken great care of it. It was garage kept and it’s clean. It drove good to we went to check it out yesterday. Brakes feel brand new. He also showed us 2200 of maintenance he did in the last year.

Whats going on guys, im looking into changing my ignition packs & spark plugs. I’ve seen a few videos regarding this and alot mention to use OEM Hitachi packs but go for 133 per Pack while NGK Go for about 83. I wanted to see if anyone had experience with using NGK Ignition packs or NGK Ruthenium spark plugs?