Brother, you nailed it. I have 2008 G37s. When I first got my car, it had 30,000, and I chose this car over another G37s with 10,000 miles because my car had the technology package I was looking for. Now, it has over 200,000 miles with an after-market tune and runs like a beast. With that being said, I have reinvested from top to bottom in this car. It also It's has a custom sound system with a DSP, 2 amplifiers, one for the front and the other for the rear, along with pro audio speakers and a ported subwoofer. These cars have a platform similar to the Nissan 370z, and you can make them into something very special.
Hi you said that you tuned the car so it shifts better, did you tune the tcm or ecu. My transmission also acts weird and apparently I need a tcm update which costs like 500 from infiniti so I’ll rather have a transmission tune if there is smth like that. What did the tuners tune specifically