This is something that seem to obsess car guys for some reason. IMHO all cars that roll out of the factory is too high. The ride height is set at the factory to accommodate a variety of market demands (road conditions, the need for the car to work well year round and not to allow the tires to rub the bodywork in extreme conditions causing damage to the bodywork). Very rarely are they set up to allow maximum performance or appearance. Japanese manufacturers seem the worse, Germans the best and the rest somewhere in between.
The GTR comes from the factory with incredible performance credentials. The CBA lapped the Nurburgring in 7:38 at its debut and has continually dropped lower and lower in subsequent updates to the current insane 7:08 (with the Nismo Edition with the N-attack package). I can't help but think the times have dropped due to suspension black magic and ride height adjustments. Ride height drops the centre of gravity, allows the car to hook up better, improves aerodynamic efficiency by controlling undercar turbulence and makes the car look sweet.
When I bought this car the first major purchase for it was an HKS GT570 kit. This was from a guy in the maritimes who was a distributor with extra inventory he had picked up when HKS stopped its North American operations. It was a smoking hot deal, made better by the fact he threw in H&R springs for free. These springs dropped the car an inch all around for an aggressive slammed look.
Before:
After:
Springs are nice if you just want a drop you can live with and not lose the car's cockpit suspension controls. I liked the looks but with my aggressive ADV1 wheels which pushed the front tires to the extreme outer edge of the wheel well, I was having a lot of rubbing issues when I went over ANY BUMPS on the road. It was so bad I started looking into new wheels that had more negative offset to bring the wheels deeper into the well. I eventually removed a couple of wheel well liner screws in the 10 and 2 o'clock position to stop the rubbing but big dips still sucked.
After 4 months I had enough, bit the bullet an ordered the KW sleeve kit.
It's amazing what the change in spring rate and careful ride height adjustment will do. The car rides comfortably and feel noticeably tighter on turn in than stock and eons better than the H&Rs. Never looked back and highly recommend this for anyone. The best part was I am able to get the car corner balanced and dialled in a very useable (and mature) look to the car.
Final results:
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