Noise under floor normal?

Quick question got a catless downpipe installed today. The setup is a catless downpipe 3" that runs to a 3" straight pipe and it is... VERY VERY LOUD.

Question is this: There is a rumble under foot at idle that comes and goes that wasn't there with the stock DP. Is this rumble normal? It is only at idle and yes I have the stage 2 file.

Admin can this be moved to the GTI 2.0T section?
Thanks

Found issue and resolved. Race land down pipes hangers are too long and can bang off the subframe. Zipped 1/4" off each hanger and all is better.

moved to the gti section...