I am wondering.. Does the allignment of our cars mess up easily. I get my car balanced and alligned alot and it aways messes up again... it vibrates from 40 mph to like 70.. much more than liike 75 you cant notice it..

Also does anyone have sound clips and opinions on the 350z midpipe on the sedan.

 

i aligned my car about a month ago and is now steering to the right now.

 

That's tire balance, not alignment.