New Milltek sounds broken?

[nukkiz276]

My car also makes this fluttering noise with a non res catback Miltek

I had it on the ramp with a torch looking up the pipes with gentle revving as presumed it was the flaps but they are open and not moving (miltek delete module).

The noise is either an engine noise being amplified or the baffles are broken in the box. Only the offside box is making the noise

MM

Probably a noise from the engine yes, I hear that a lot of owners have this "issue" but a lot havent it...
A X-Pipe would reduce the noise but the car will sound more like "standard v8" and not the monster it sounds like with the H-Pipe.