Yeah unfortunately the leather they used on these seats isnt topnotch... The red color especially on the edges, fades pretty fast. Id try investing in better leather care products like Colourlock or Gliptone. I’ve had some luck conditioning the leather every few weeks, and if you spill anything...
Hey! Im definitely no expert buuut that clicking could be related to the relay for the suspension or even the auto transmission control. Sometimes relays freak out when they're overloaded. Check for loose wires or the stiffness adjustment switch? Maybe cleaning it up could help??
Additionally...
as far as i know the 15" brakes can be bolted onto the Performance model, but be careful with the wheels. Not all will fit, you need to check clearance near the calipers. About the brake master cylinder in Nismo Z, there aren’t significant differences compared to Performance. My mate checked...
12-inch wide wheels can fit on the back of the 2023-2024 Nissan Z, but modifications may be required to ensure proper clearance, offset, and suspension compatibility.