Make up your mind....
Thats the problem with so many racers these days, they want a fast car but they don't want to put up with any of the inconviences of it. Such as: Noise, rattles, shakes, higher maitinence costs and labor (this really hits your pocket book hard if you don't do it yourself..) and other such minor things. I'm a MOPAR freak myself, but I respect Nissan for not only their effort, but their integrity. If you want a fast car, don't complain when some mod you do makes it rattle, squeek or shake a bit....as long as it take a few seconds off your track times, or makes the internals run more smoothly, don't complain. But also be carefull, if the rattle and shakes get progressively worse, it could be a sign of a bad job and you'd be best off checking it yourself or having someone else check it...(besides the person who did it..) Mechanics have pride (or they're dishonest..)and some won't admit do doing a bad job or not knowing how to do a job properly.
Don't sweat the small stuff.