I have it installed and it does. I think like @Toadster says it either stiffens it in the right place where it reduces it, or it transfers it to where you feel it less. Either way there are multiple people that have the bar installed that will tell you what I say is true. Maybe check out these review threads:How does a traction bar "remove" NVH?
This. It does remove a lot of the NVH. Only on cold starts does my interior rattle now. I'm not sure I would recommend the Cobb RMM if you are looking for a balance of comfort. It almost completely eliminated wheel-hop, but it sure does vibrate without the 'traction' bar. (The only noticeable benefit of the traction bar was the reduction of vibration. I'd still purchase it again, but just a disclaimer).probably relocates the NVH to the body differently than the RMM - I could see that... no experience though - others?