I run the SP1R titanium exhaust. It's a little aggressive, but I love the sound. The quality and fit is excellent. Some modifications to the diffuser and heat shield are required.
New Z is an over priced Nissan junk. Only kids and old guys that can't drive want this slow car. I have had the chance to race two of them and punished them badly. My car just has bolt ons with JB4 and jesse custom tune on 93 pump gas.
I do my oil change every 3k with 5w30 Amsoil European. I drive the car very hard and street race often. My car has bolt ons catless downpipe, Jb4 with custom Jesse's custom map. Car makes 450whp.
Jb4 ots maps are not the greatest do yourself a favor and let a pro like @Jesse DaBears make a custom map. My car walks other Supras with his tune. Very different than the ots tunes. Jesse is the man.
I run 5w 30 Amsoil European similar mods car makes 450 whp and do yourself a favor and change oil every 3k miles forget what the idiot book says. Turbo cars beat up oil.