So I took it to the shop and got it install. Now when I'm in D mode with my foot on the brake there is the rattling noise. What can that be? the center bar has been taking off already. Any advice guys?

 

Best thing to do is try to figure out where the noise is coming from, get underneath the car and start banging on the area to see if you could replicate the noise.

 

I have ark exhausts, the install was smooth as I know the techs that worked on it. As for the tips of the exhaust lining up I noticed it does not, One side is little longer then the other. As for performance and sound I really like it, no regrets going with ARK.

 

I just now notice there are 3 chips mark on the tip at the right side..

 

Take it back to the shop and try to replicate it for them. If they're reputable, they'll throw it back on the lift and troubleshoot it for you.

 

Had the same rattle noise after my ark install. It came from the rear exhaust hanger. The metal hanger was rattling against the hard plastic undercarriage.