My buddy has an HKS set up on his g37s and puts out great numbers. It only gets "too loud" when you push it. Otherwise its a subtle ride and looks great with burnt tips.

 

I'd just do a muffler delete and get 2.5" piping from the resonators back. In Kuwait, it'll be difficult to get many of the popular full exhaust systems for a reasonable price.

 

I got a new Nissan 370Z ARK exhaust and installed it. It was abit short so at the garage I had to install a new pipe at the front. I also installed Cut-out system.

The exhausts sound is abit too loud even when the car is idle, but I like it.

I can also switch off the Cut-out system and then the car gets quiet.