When i bought my car with the 400r front bar allready on it, it was 70 ****ing mm off the ground! When i went crusing for the first week through most of the ' lap ' spots i could not drive over the speed bumps, i could not drive into certain drive ways, i could not drive into my own driveway, i could not get into servo's or bloody anywhere. After cracking the shits and the bar a few times i got the springs done and raised to 110mm, which still i have to go up certain speed bumps and driveways on angles, which sucks big time, but most things are allright, you just have to go up slow, then it's all good. I would suggest about a 130mm ride hite, it's still pretty damn low but you should be able to navigate most things straght onwards, this is with 18's aswell. I also believe that you need some sort of bigger side kirts otherwise the bar does tend to make the car look big at the front with the stock skirts, nismo side skirts are good and look the part. Overall the 400r bar is awsome, it gives the whole of the car a much more aggresive look, it almost looks evil. Get it!