What has Nissan done to the exhaust? The car sounds okay if it is at high revs, but at low revs and just driving at neighborhood speeds it sounds like it is working really hard just to go 25. Sounds so ugly and loud. Why is that? It's like they didn't put any resonators on the exhaust to cancel out the ugly, contrived sounding lower frequencies. Shouldn't a luxury car like G35 sound quiet unless you really step on it? Even then it should be quiet. Sounds so fake. I like the car otherwise (except the shoddy interior), but now that I know they all sound so fake I don't want one.